- 
    Bug 
- 
    Resolution: Duplicate
- 
    P1: Critical 
- 
    5.12.4, 5.13.1
- 
    None
- 
    MacBook Pro Retina Late 2013
 macOS Mojave 10.14.6
Have a widget with a button which shows a QDialog for instance
- Start application on first monitor
- Press button to trigger open of dialog, dialog is correctly displayed
- Close dialog
- Move application on second monitor
- Press button to trigger again of dialog, dialog is empty (NOTE: if you resize the QDialog, it is correctly rendered)
Attached sample application

