[Reg 6.5 -> 6.7] Flicker on Android App Exit

When exiting an Android app, built using recommended configurations from the Qt for Android web page using either CMake or QMake, there is occasionally a momentary, but very noticeable, flicker to black as the application exits.

The debug output does not seem to correlate exactly with the issue but there is frequently a SIGABRT (Fatal Signal 6) around the same time that the UI exits and the flicker happens.

This occurs both when the application exits via the Android navigation bar back button and any software triggered closure. The issue occurs both when the app animates a closure towards its icon in the drawer and when closing without that animation, for example if the user has navigated to their home screen with no icon for the application.

The most minimal application and more complex applications experience the same result.

This is cannot be replicated by test applications that were previously built using 6.5.1 when deployed on the same target hardware.

Thank you!