Incoming call on Bluetooth headphones changing actual ringtone
While using Bluetooth headphones with my IPhone XR (iOS 17.4.1), the actual ringtone has started changing when I get an incoming call.
It begins with a normal ring (2-3Xs), then changes to a repeated (and very annoying) voice saying an unintelligible word. This happens with both identified and unidentified calls.
I've checked all the settings that I can think of that would affect this, but I'm at my wits end. Any help would be most appreciated.
iPhone XR, iOS 17