The list created by QCompleter in QLineEdit is not clickable if it appears inside QDialog. It can only be selected using keyboard.

To reproduce, run the attached example:

1. Click push button
2. Dialog with line edit appears. Start typing "Str"
3. The list of completions appears. Try clicking/scrolling the list

Result: the clicks are ignored.

Expected result: mouse works normally.

This works correctly in older versions of Qt. Also, it works correctly in the main window, as can be seen in the attached example.