On Android, if High DPI scaling is enabled, it appears that sometimes a mouse or stylus cannot be used to select items in QComboBoxes, QMenus or sometimes QPushButtons . It's not always broken, but seems to depend upon other widgets used.

I've attached a small reproducible example, where the QComboBox is inside a QDockWidget. The problem here only appears to be when docked on the right, not the left. However, in more complicated examples (i.e. a full application) the ComboBoxes don't seem to work at all.

In the example, the problem goes away if High DPI Scaling is disabled, but this can only be done on Qt 5.15.2, not 6.4.0.