map viewer example throws exception on exit

1. Open the map viewer example.
   It's in Examples\Qt-5.15.0\location\mapviewer\mapviewer.pro when installed from the online installer.
2. Build and run a release build.
3. Play around with it for a couple of minutes. Change map types, zoom in and out, try to find the locations of your last holidays, ...
4. Close it.
   Windows often reports that the application threw an exception.

Unfortunately I was not able to get a stacktrace. I hope you can reproduce it yourself.