Crash when closing MacBook lid while Qt Creator was full screen on second monitor

Qt Creator sometimes crashes on macOS in a two-display situation. To reproduce:

1. Connect the second display
2. Open Qt Creator and move the window to the second display
3. Enter full screen, so Qt Creator is now full-screen on the second display
4. Switch back to the desktop (Ctrl+Left arrow) so that Qt Creator is not visible
5. Put the MacBook to sleep
6. Close the lid of the MacBook
7. Re-open lid and log in -> Qt Creator is gone

Crash report with backtrace: Qt_Creator_crash_macOS_sleep_multi_display.txt

This crash is present in all versions of Qt Creator 14.x, but not in 13.x. It reminds me of https://bugreports.qt.io/browse/QTCREATORBUG-29424, which occurred in some versions but was then indeed fixed, as reflected by that report. But now it seems to be back; I decided to open a new issue because the crash report is slightly different.