Following https://stackoverflow.com/questions/74097583/combobox-makes-selection-with-touch-events-difficult, a value of 1 causes touch events to not register correctly on some devices (tested on 2 Samsung Galaxys). A value of 2 works better. I suggest changing the default for Andoird to 2 at https://github.com/gluonhq/substrate/blob/master/src/main/resources/native/android/c/launcher.c#L69.