diff --git a/src/core/cdrom.cpp b/src/core/cdrom.cpp
index a4fd3b4ed..aaddad28d 100644
--- a/src/core/cdrom.cpp
+++ b/src/core/cdrom.cpp
@@ -1913,7 +1913,18 @@ void CDROM::UpdatePhysicalPosition(bool update_logical)
   const u32 ticks = TimingEvents::GetGlobalTickCounter();
   if (IsSeeking() || IsReadingOrPlaying() || !m_secondary_status.motor_on)
   {
-    // set by the event
+    // If we're seeking+reading the first sector (no stat bits set), we need to return the set/current lba, not the last
+    // physical LBA. Failing to do so may result in a track-jumped position getting returned in GetlocP, which causes
+    // Mad Panic Coaster to go into a seek+play loop.
+    if ((m_secondary_status.bits & (STAT_READING | STAT_PLAYING_CDDA | STAT_MOTOR_ON)) == STAT_MOTOR_ON &&
+        m_current_lba != m_physical_lba)
+    {
+      Log_WarningPrintf("Jumping to hold position [%u->%u] while %s first sector", m_physical_lba, m_current_lba,
+                        (m_drive_state == DriveState::Reading) ? "reading" : "playing");
+      SetHoldPosition(m_current_lba, true);
+    }
+
+    // Otherwise, this gets updated by the read event.
     return;
   }
 
diff --git a/src/core/host_interface.cpp b/src/core/host_interface.cpp
index d0f25fe4f..efb9bbf0c 100644
--- a/src/core/host_interface.cpp
+++ b/src/core/host_interface.cpp
@@ -456,25 +456,6 @@ bool HostInterface::SaveState(const char* filename)
   return result;
 }
 
-void HostInterface::OnSystemCreated() {}
-
-void HostInterface::OnSystemPaused(bool paused) {}
-
-void HostInterface::OnSystemDestroyed() {}
-
-void HostInterface::OnSystemPerformanceCountersUpdated() {}
-
-void HostInterface::OnDisplayInvalidated() {}
-
-void HostInterface::OnSystemStateSaved(bool global, s32 slot) {}
-
-void HostInterface::OnRunningGameChanged(const std::string& path, CDImage* image, const std::string& game_code,
-                                         const std::string& game_title)
-{
-}
-
-void HostInterface::OnControllerTypeChanged(u32 slot) {}
-
 std::string HostInterface::GetShaderCacheBasePath() const
 {
   return GetUserDirectoryRelativePath("cache/");
@@ -1197,13 +1178,3 @@ void HostInterface::RecreateSystem()
   System::ResetThrottler();
   OnDisplayInvalidated();
 }
-
-void HostInterface::SetMouseMode(bool relative, bool hide_cursor) {}
-
-void HostInterface::DisplayLoadingScreen(const char* message, int progress_min /*= -1*/, int progress_max /*= -1*/,
-                                         int progress_value /*= -1*/)
-{
-  Log_InfoPrintf("Loading: %s %d of %d-%d", message, progress_value, progress_min, progress_max);
-}
-
-void HostInterface::GetGameInfo(const char* path, CDImage* image, std::string* code, std::string* title) {}
diff --git a/src/core/host_interface.h b/src/core/host_interface.h
index 0b03a90f8..bf606b99e 100644
--- a/src/core/host_interface.h
+++ b/src/core/host_interface.h
@@ -88,10 +88,10 @@ public:
   /// Displays a loading screen with the logo, rendered with ImGui. Use when executing possibly-time-consuming tasks
   /// such as compiling shaders when starting up.
   virtual void DisplayLoadingScreen(const char* message, int progress_min = -1, int progress_max = -1,
-                                    int progress_value = -1);
+                                    int progress_value = -1)  = 0;
 
   /// Retrieves information about specified game from game list.
-  virtual void GetGameInfo(const char* path, CDImage* image, std::string* code, std::string* title);
+  virtual void GetGameInfo(const char* path, CDImage* image, std::string* code, std::string* title) = 0;
 
   /// Returns the directory where per-game memory cards will be saved.
   virtual std::string GetMemoryCardDirectory() const;
@@ -147,11 +147,11 @@ public:
   virtual std::unique_ptr<ByteStream> OpenPackageFile(const char* path, u32 flags) = 0;
 
   virtual void OnRunningGameChanged(const std::string& path, CDImage* image, const std::string& game_code,
-                                    const std::string& game_title);
-  virtual void OnSystemPerformanceCountersUpdated();
+                                    const std::string& game_title) = 0;
+  virtual void OnSystemPerformanceCountersUpdated() = 0;
 
   /// Called when the display is invalidated (e.g. a state is loaded).
-  virtual void OnDisplayInvalidated();
+  virtual void OnDisplayInvalidated() = 0;
 
 protected:
   virtual bool AcquireHostDisplay() = 0;
@@ -159,11 +159,10 @@ protected:
   virtual std::unique_ptr<AudioStream> CreateAudioStream(AudioBackend backend) = 0;
   virtual s32 GetAudioOutputVolume() const;
 
-  virtual void OnSystemCreated();
-  virtual void OnSystemPaused(bool paused);
-  virtual void OnSystemDestroyed();
-  virtual void OnSystemStateSaved(bool global, s32 slot);
-  virtual void OnControllerTypeChanged(u32 slot);
+  virtual void OnSystemCreated() = 0;
+  virtual void OnSystemPaused(bool paused) = 0;
+  virtual void OnSystemDestroyed() = 0;
+  virtual void OnControllerTypeChanged(u32 slot) = 0;
 
   /// Restores all settings to defaults.
   virtual void SetDefaultSettings(SettingsInterface& si);
@@ -184,7 +183,7 @@ protected:
   virtual void RecreateSystem();
 
   /// Enables "relative" mouse mode, locking the cursor position and returning relative coordinates.
-  virtual void SetMouseMode(bool relative, bool hide_cursor);
+  virtual void SetMouseMode(bool relative, bool hide_cursor) = 0;
 
   /// Call when host display size changes, use with "match display" aspect ratio setting.
   virtual void OnHostDisplayResized();
diff --git a/src/duckstation-nogui/nogui_host_interface.cpp b/src/duckstation-nogui/nogui_host_interface.cpp
index 638af4eaa..403be7490 100644
--- a/src/duckstation-nogui/nogui_host_interface.cpp
+++ b/src/duckstation-nogui/nogui_host_interface.cpp
@@ -89,6 +89,10 @@ void NoGUIHostInterface::SetDefaultSettings(SettingsInterface& si)
   si.SetStringValue("Hotkeys", "OpenQuickMenu", "Keyboard/Escape");
 }
 
+void NoGUIHostInterface::OnDisplayInvalidated() {}
+
+void NoGUIHostInterface::OnSystemPerformanceCountersUpdated() {}
+
 bool NoGUIHostInterface::CreateDisplay(bool fullscreen)
 {
   std::optional<WindowInfo> wi = GetPlatformWindowInfo();
diff --git a/src/duckstation-nogui/nogui_host_interface.h b/src/duckstation-nogui/nogui_host_interface.h
index cfda03ff2..a2a01222e 100644
--- a/src/duckstation-nogui/nogui_host_interface.h
+++ b/src/duckstation-nogui/nogui_host_interface.h
@@ -31,6 +31,9 @@ public:
 
   void RunLater(std::function<void()> callback) override;
 
+  virtual void OnDisplayInvalidated() override;
+  virtual void OnSystemPerformanceCountersUpdated() override;
+
 protected:
   enum : u32
   {
diff --git a/src/duckstation-nogui/sdl_host_interface.cpp b/src/duckstation-nogui/sdl_host_interface.cpp
index ccd935f57..37f1a4ca3 100644
--- a/src/duckstation-nogui/sdl_host_interface.cpp
+++ b/src/duckstation-nogui/sdl_host_interface.cpp
@@ -260,6 +260,8 @@ std::optional<CommonHostInterface::HostKeyCode> SDLHostInterface::GetHostKeyCode
   return static_cast<HostKeyCode>(*code);
 }
 
+void SDLHostInterface::SetMouseMode(bool relative, bool hide_cursor) {}
+
 void SDLHostInterface::PollAndUpdate()
 {
   // Process SDL events before the controller interface can steal them.
diff --git a/src/duckstation-nogui/sdl_host_interface.h b/src/duckstation-nogui/sdl_host_interface.h
index 6eece50bb..7ac5dbdae 100644
--- a/src/duckstation-nogui/sdl_host_interface.h
+++ b/src/duckstation-nogui/sdl_host_interface.h
@@ -21,6 +21,8 @@ public:
   bool SetFullscreen(bool enabled) override;
 
 protected:
+  void SetMouseMode(bool relative, bool hide_cursor) override;
+
   void PollAndUpdate() override;
 
   std::optional<HostKeyCode> GetHostKeyCode(const std::string_view key_code) const override;
diff --git a/src/duckstation-nogui/vty_host_interface.cpp b/src/duckstation-nogui/vty_host_interface.cpp
index aa753e7d1..9b7b5a239 100644
--- a/src/duckstation-nogui/vty_host_interface.cpp
+++ b/src/duckstation-nogui/vty_host_interface.cpp
@@ -111,6 +111,8 @@ void VTYHostInterface::PollAndUpdate()
   NoGUIHostInterface::PollAndUpdate();
 }
 
+void VTYHostInterface::SetMouseMode(bool relative, bool hide_cursor) {}
+
 void VTYHostInterface::OpenEVDevFDs()
 {
   for (int i = 0; i < 1000; i++)
diff --git a/src/duckstation-nogui/vty_host_interface.h b/src/duckstation-nogui/vty_host_interface.h
index e18841e1a..169d665ae 100644
--- a/src/duckstation-nogui/vty_host_interface.h
+++ b/src/duckstation-nogui/vty_host_interface.h
@@ -29,6 +29,8 @@ protected:
 
   void PollAndUpdate() override;
 
+  void SetMouseMode(bool relative, bool hide_cursor) override;
+
 private:
   static void SIGTERMHandler(int sig);
 
diff --git a/src/duckstation-nogui/win32_host_interface.cpp b/src/duckstation-nogui/win32_host_interface.cpp
index 27ebe9eec..51f99d483 100644
--- a/src/duckstation-nogui/win32_host_interface.cpp
+++ b/src/duckstation-nogui/win32_host_interface.cpp
@@ -57,6 +57,8 @@ bool Win32HostInterface::RegisterWindowClass()
   return true;
 }
 
+void Win32HostInterface::SetMouseMode(bool relative, bool hide_cursor) {}
+
 bool Win32HostInterface::CreatePlatformWindow()
 {
   m_hwnd = CreateWindowExW(WS_EX_CLIENTEDGE, WINDOW_CLASS_NAME, L"DuckStation", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,
diff --git a/src/duckstation-nogui/win32_host_interface.h b/src/duckstation-nogui/win32_host_interface.h
index c25a067ec..86bc60cb4 100644
--- a/src/duckstation-nogui/win32_host_interface.h
+++ b/src/duckstation-nogui/win32_host_interface.h
@@ -16,6 +16,8 @@ public:
   static std::unique_ptr<NoGUIHostInterface> Create();
 
 protected:
+  void SetMouseMode(bool relative, bool hide_cursor) override;
+
   bool CreatePlatformWindow() override;
   void DestroyPlatformWindow() override;
   std::optional<WindowInfo> GetPlatformWindowInfo() override;
diff --git a/src/duckstation-qt/qthostinterface.cpp b/src/duckstation-qt/qthostinterface.cpp
index 80522783b..b43fb1317 100644
--- a/src/duckstation-qt/qthostinterface.cpp
+++ b/src/duckstation-qt/qthostinterface.cpp
@@ -784,8 +784,6 @@ void QtHostInterface::OnSystemDestroyed()
 
 void QtHostInterface::OnSystemPerformanceCountersUpdated()
 {
-  HostInterface::OnSystemPerformanceCountersUpdated();
-
   GPURenderer renderer = GPURenderer::Count;
   u32 render_width = 0;
   u32 render_height = 0;
diff --git a/src/duckstation-regtest/regtest_host_interface.cpp b/src/duckstation-regtest/regtest_host_interface.cpp
index d38b589f6..8e8bce643 100644
--- a/src/duckstation-regtest/regtest_host_interface.cpp
+++ b/src/duckstation-regtest/regtest_host_interface.cpp
@@ -104,8 +104,6 @@ void RegTestHostInterface::GetGameInfo(const char* path, CDImage* image, std::st
 void RegTestHostInterface::OnRunningGameChanged(const std::string& path, CDImage* image, const std::string& game_code,
                                                 const std::string& game_title)
 {
-  HostInterface::OnRunningGameChanged(path, image, game_code, game_title);
-
   Log_InfoPrintf("Game Path: %s", path.c_str());
   Log_InfoPrintf("Game Code: %s", game_code.c_str());
   Log_InfoPrintf("Game Title: %s", game_title.c_str());
@@ -128,6 +126,10 @@ void RegTestHostInterface::OnRunningGameChanged(const std::string& path, CDImage
   UpdateSettings();
 }
 
+void RegTestHostInterface::OnSystemPerformanceCountersUpdated() {}
+
+void RegTestHostInterface::OnDisplayInvalidated() {}
+
 std::string RegTestHostInterface::GetStringSettingValue(const char* section, const char* key,
                                                         const char* default_value /*= ""*/)
 {
@@ -284,6 +286,16 @@ std::unique_ptr<AudioStream> RegTestHostInterface::CreateAudioStream(AudioBacken
   return AudioStream::CreateNullAudioStream();
 }
 
+void RegTestHostInterface::OnSystemCreated() {}
+
+void RegTestHostInterface::OnSystemPaused(bool paused) {}
+
+void RegTestHostInterface::OnSystemDestroyed() {}
+
+void RegTestHostInterface::OnControllerTypeChanged(u32 slot) {}
+
+void RegTestHostInterface::SetMouseMode(bool relative, bool hide_cursor) {}
+
 static void PrintCommandLineVersion()
 {
   const bool was_console_enabled = Log::IsConsoleOutputEnabled();
diff --git a/src/duckstation-regtest/regtest_host_interface.h b/src/duckstation-regtest/regtest_host_interface.h
index b2e98c6c8..cb5626b68 100644
--- a/src/duckstation-regtest/regtest_host_interface.h
+++ b/src/duckstation-regtest/regtest_host_interface.h
@@ -2,7 +2,7 @@
 #include "core/host_interface.h"
 #include "regtest_settings_interface.h"
 
-class RegTestHostInterface : public HostInterface
+class RegTestHostInterface final : public HostInterface
 {
 public:
   RegTestHostInterface();
@@ -34,12 +34,22 @@ public:
 
   std::unique_ptr<ByteStream> OpenPackageFile(const char* path, u32 flags) override;
 
+  void OnSystemPerformanceCountersUpdated() override;
+  void OnDisplayInvalidated() override;
+
 protected:
   bool AcquireHostDisplay() override;
   void ReleaseHostDisplay() override;
 
   std::unique_ptr<AudioStream> CreateAudioStream(AudioBackend backend) override;
 
+  void OnSystemCreated() override;
+  void OnSystemPaused(bool paused) override;
+  void OnSystemDestroyed() override;
+  void OnControllerTypeChanged(u32 slot) override;
+
+  void SetMouseMode(bool relative, bool hide_cursor) override;
+
 private:
   void LoadGameSettingsDatabase();
   void InitializeSettings();
diff --git a/src/frontend-common/common_host_interface.cpp b/src/frontend-common/common_host_interface.cpp
index 400328acf..1c32a6d32 100644
--- a/src/frontend-common/common_host_interface.cpp
+++ b/src/frontend-common/common_host_interface.cpp
@@ -840,11 +840,7 @@ bool CommonHostInterface::SaveState(bool global, s32 slot)
 
   std::string save_path = global ? GetGlobalSaveStateFileName(slot) : GetGameSaveStateFileName(code.c_str(), slot);
   RenameCurrentSaveStateToBackup(save_path.c_str());
-  if (!SaveState(save_path.c_str()))
-    return false;
-
-  OnSystemStateSaved(global, slot);
-  return true;
+  return SaveState(save_path.c_str());
 }
 
 bool CommonHostInterface::CanResumeSystemFromFile(const char* filename)
@@ -1090,8 +1086,6 @@ void CommonHostInterface::SetUserDirectory()
 
 void CommonHostInterface::OnSystemCreated()
 {
-  HostInterface::OnSystemCreated();
-
   if (m_fullscreen_ui_enabled)
     FullscreenUI::SystemCreated();
 
@@ -1127,8 +1121,6 @@ void CommonHostInterface::OnSystemDestroyed()
   if (m_display)
     m_display->SetDisplayMaxFPS(0.0f);
 
-  HostInterface::OnSystemDestroyed();
-
   if (m_fullscreen_ui_enabled)
     FullscreenUI::SystemDestroyed();
 
@@ -1139,8 +1131,6 @@ void CommonHostInterface::OnSystemDestroyed()
 void CommonHostInterface::OnRunningGameChanged(const std::string& path, CDImage* image, const std::string& game_code,
                                                const std::string& game_title)
 {
-  HostInterface::OnRunningGameChanged(path, image, game_code, game_title);
-
   if (g_settings.apply_game_settings)
     ApplySettings(true);
 
@@ -1166,8 +1156,6 @@ void CommonHostInterface::OnRunningGameChanged(const std::string& path, CDImage*
 
 void CommonHostInterface::OnControllerTypeChanged(u32 slot)
 {
-  HostInterface::OnControllerTypeChanged(slot);
-
   UpdateInputMap();
 }
 
@@ -2821,8 +2809,8 @@ bool CommonHostInterface::ApplyInputProfile(const char* profile_path)
       continue;
     }
 
+    // We don't need to call ControllerTypeChanged here because we're already updating the input map.
     g_settings.controller_types[controller_index - 1] = *ctype;
-    HostInterface::OnControllerTypeChanged(controller_index - 1);
 
     m_settings_interface->SetStringValue(section_name, "Type", Settings::GetControllerTypeName(*ctype));