Steps to reproduce:

1. Create a simple project with a QComboBox or use an existing example, e.g.: https://doc.qt.io/qt-6/qtwidgets-widgets-lineedits-example.html 
2. Build and run the project on android device.
3. Open combobox list.
4. Rotate the device and try to open the list again.
5. Rotate it back and try to open the list again.

Expected: The list of items should appear.

Actual: The list does not occur. In step 5 it appears but the content is black.

Reproducibility:  100% 

NOTES: It is not reproducible with Qt 5.15.12 - combobox appears in incorrect position but user is still able to select the option.