During a video call i see that the application is too slow!
For example: in my application, clicking on a button, the application shows a modal menu that the user can use to select the camera or make some others operations.
If the user clicks on this button before making a video call, the application shows the menu instantly; in other case, clicking the button during a video call, the menu is displayed after a long time.
Another example is the call duration timer: during a video call, for approximately 30 seconds, the application shows the correct elapsed time; after 30 seconds the counter seems to freeze for 5 or 6 seconds, after that is updated.
It seems that during the video call there is an expansive heavy native process that blocks the thread.