Here's a strange one, the sleep timer on the Audible app on an iPhone has stopped working. It works OK on an Android device, and was OK for months on an old iPhone 5 until two days ago.
I did reinstall the app, same problem, but I noticed that it will still work using the phone's speaker, it seems to be Bluetooth that makes it not work. but it did work OK on Bluetooth until two days ago.
This thread is now locked and can not be replied to.