There is no simple app example yet but the issue happens on Pixel2 device with Android 11 if any accessibility service is turned on, e.g.

or AnyDesk Control Service AD1

as soon as any accessibility service is started our app crashes randomly at different places - even on start. The trace in logcat is the same

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W/Qt A11Y: AccessibilityEvent with empty description
E/libc++abi: Pure virtual function called!
A/libc: Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 8075

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The issue is similar to the closed QTBUG-85379