The proper solution to this issue is to fix your concurrency bugs as suggested now in 3 replies. It's better for the app to crash than for state to become subtly corrupted for random users over time. https://developer.apple.com/forums/thread/662240?answerId=637641022#637641022 https://developer.apple.com/forums/thread/662240?answerId=650357022#650357022 https://developer.apple.com/forums/thread/662240?answerId=705857022#705857022