I am playing an audio by using STKAudioPlayer third party code base, and getting on crash once for all iOS 14.x. I posted my question Here at Apple forums - https://developer.apple.com/forums/thread/649904 but still I can see this crash log in crashlytics.
As per logs detail, its seems when app in Background mode.
Xcode version: 12.1(12A7403), Xcode 11.3
log from Crashlytics - https://developer.apple.com/forums/content/attachment/9b8f0f8f-ba92-4c95-9100-1f2a872f6b0d