Unsolved Application's UI becomes unresponsive after switching apps

[Vega4]

This happens randomly.
No errors are reported.

The only suspicious fragments are reported as warning to be seen below:

E Surface : dequeueBuffer: IGraphicBufferProducer::requestBuffer failed: -19
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libEGL  : EGLNativeWindowType 0x7b24d7a650 disconnect failed
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W mali_winsys: native_window_api_disconnect failed: -19
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
W libEGL  : EGLNativeWindowType 0x7af4b57010 disconnect failed
W libappoken_arm64-v8a.so: QEGLPlatformContext: eglSwapBuffers failed: 300d
D ZrHung.AppEyeUiProbe: not watching, wait.
D ZrHung.AppEyeUiProbe: restart watching

[Vega4]

Reported here: https://bugreports.qt.io/browse/QTBUG-93363