Same issue on our side.
shoaibahmad
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The problem seems to be with the deallocation of the child MOCs, we are using inside our app. We tested the app in parallel on iOS 14.2, iOS 15.1.1 and 15.2-beta. The results are, on iOS 14.2, it runs smoothly, the ARC is quite tolerant. On 15.x, however, we have unexpected crashes, which sometime log Zombie objects and sometimes the DispatchSemaphore gets stuck (I managed to resolve the last one disabling backtrace recording in Edit scheme -> Options -> Queue Debugging).