diff --git a/newIDE/app/src/EventsSheet/ParameterFields/GenericExpressionField/ExpressionAutocompletionsHandler.js b/newIDE/app/src/EventsSheet/ParameterFields/GenericExpressionField/ExpressionAutocompletionsHandler.js
index d86ed45512..a6328fcc95 100644
--- a/newIDE/app/src/EventsSheet/ParameterFields/GenericExpressionField/ExpressionAutocompletionsHandler.js
+++ b/newIDE/app/src/EventsSheet/ParameterFields/GenericExpressionField/ExpressionAutocompletionsHandler.js
@@ -152,6 +152,18 @@ export const handleAutocompletionsKeyDown = (
       if (autocompletion.isExact) return state;
       onInsertAutocompletion(autocompletion);
 
+      // Stop propagation to avoid closing the modal the
+      // field is contained in.
+      event.stopPropagation();
+    } else {
+      const additionalAction =
+        state.additionalActions[
+          state.selectedCompletionIndex - state.autocompletions.length
+        ];
+      if (additionalAction) {
+        additionalAction.onClick();
+      }
+
       // Stop propagation to avoid closing the modal the
       // field is contained in.
       event.stopPropagation();
diff --git a/newIDE/app/src/EventsSheet/ParameterFields/GenericExpressionField/index.js b/newIDE/app/src/EventsSheet/ParameterFields/GenericExpressionField/index.js
index 0ad4b5d7c4..b6b528b94e 100644
--- a/newIDE/app/src/EventsSheet/ParameterFields/GenericExpressionField/index.js
+++ b/newIDE/app/src/EventsSheet/ParameterFields/GenericExpressionField/index.js
@@ -499,7 +499,7 @@ export default class ExpressionField extends React.Component<Props, State> {
       onGetAdditionalAutocompletions,
       onExtractAdditionalErrors,
     } = this.props;
-    if (!project || !instruction) return null;
+    if (!project) return null;
 
     const expression = this.state.validatedValue;
 
@@ -509,11 +509,13 @@ export default class ExpressionField extends React.Component<Props, State> {
     const parser = new gd.ExpressionParser2();
     const expressionNode = parser.parseExpression(expression).get();
 
-    const objectName = gd.InstructionValidator.getObjectNameForParameter(
-      projectScopedContainersAccessor.get(),
-      instruction,
-      expressionType
-    );
+    const objectName = instruction
+      ? gd.InstructionValidator.getObjectNameForParameter(
+          projectScopedContainersAccessor.get(),
+          instruction,
+          expressionType
+        )
+      : '';
 
     const showDeprecatedInstructionWarning = this.context
       ? this.context.values.showDeprecatedInstructionWarning