QSystemTrayIcon is not recovering properly QMenu's display after a blocking call

Sleeping in the main thread is of course not recommended, but the issue also happens when clicking too fast on the icon.

1- Right click on the icon
2- Wait for the SLEEP() to finish
3- The menu is correctly displayed AFTER the SLEEP()

Now, introduce this step after the first step (right click on the icon):
1'- Right click again on the icon while it's being sleeping

From this step, there's no way to get the menu back, you have to restart the application.

See attachment for code and screenshot