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I'm running into an issue where performStartCallAction is never triggered if CXEndCallAction is called immediately after CXStartCallAction. From what I've seen via documentation and device logs, starting and ending a call with CallKit will look like this: A transaction with a CXStartCallAction is called CXStartCallAction completion handler is called performStartCallAction delegate method is triggered ... Call continues and various other actions performed... ... A transaction with a CXEndCallAction is called CXEndCallAction completion handler is called performEndCallAction delegate method is triggered However, I've noticed that if the transaction with a CXStartCallAction is called and then a CXEndCallAction transaction is called before the CXStartCallAction transaction completes, the performStartCallAction delegate method never gets triggered and the app hangs. So rather than the above, this is what I see happening: A transaction with a CXStartCallAction is called A transaction with a CXEndCallAction is called CXEndCallAction completion handler is called App hangs...no further logs until I kill the app and restart Why might this be happening? At the very least shouldn't I be getting some sort of error?