[qt-android] wrong layout after re-activating app in landscape mode

I am writing a qt-quick based android app, I have encountered the following issue:
If I set android:screenOrientation to "landscape" in android menifest file and run my application, press home button to hide my app and then select my app to show again, the UI layout will go wrong. I have attached two images to demenstrate this issue. It seems that after re-activating the app in landscape mode the app window has changed to a wrong position.