iOS 12 seems to have lot of bugs in AVFoundation code it seems. The latest one seems to be one with AVPlayer:
Cannot remove an observer <NSKeyValueObservance 0x280625ce0> for the key path "currentItem.status" from <AVPlayerInternal 0x107626840>, most likely because the value for the key "currentItem" has changed without an appropriate KVO notification being sent. Check the KVO-compliance of the AVPlayerInternal class.'
Has anyone come across this?