Qt App on Android showing a blank area when change android window flags

Hi,

The customer met an issue about Qt App on Android showing a blank area.
The attached file "launcherUIPrototype.7z" is their example.

Issue reproduce steps as below：
1. Change the android system UI bottom navigation bar position to the left in the attached file "show normal without flags.png"

2. Set android view UI Flag as the red one in the attached file "set window flag.png"
Change flags: View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE

3. If set flag like above, Qt UI will show unnormal， a blank area will show in the attached file "show blank area with flags .png"

4. If disabled flags, ui will show normal in the attached file: "show normal without flags.png"

I create some tests as below:
1. don't change the navigation bar to the left
a. using Qt app, the result will show normal
b. not using Qt app, the result will show normal
2. change the navigation bar to the left
a. using Qt app, the result will show a blank area
b. not using Qt app, the result will show normal

so I think the root cause is in Qt for android source code.