When running an unmodified version of same game on Android, you can get the "QApplication is not created on main thread" warning. This indicates that something has called QThread::currentThread() before initializing the Q*Application, causing the Android main thread to be registered instead of the Qt main thread. This may lead to crashes later on, specifically for event deliveries and signal/slot bindings, if I recall correctly.
Reportedly it only happens in debug mode, so it is probably due to a global static QObject, which has some debug-specific calls that have proven to be the cause of this before.
|For Gerrit Dashboard: QTBUG-65863|
|218705,3||Android: Defer initialization of logging rules until qApp construction||5.10.1||qt/qtbase||Status: MERGED||+2||0|
|219332,2||Android: Defer initialization of logging rules until qApp construction||5.9||qt/qtbase||Status: MERGED||+2||0|