I also got an update recently, and my bluetooth functions are totally inconsistent and misfunctioning like crazy. That's one of the most important functions for me!

The only issues I notice:

Sometimes if I am on a call, and lose the signal, the BT will not realease the call. The car will say I have been on the phone for 20 minutes, and the call dropped 15 minutes ago. I just make another call, and the call finally drops.

Sometimes it is slow, so I just practice some patience, and don't overload it with commands that are not executed.

DO NOT turn the car off while you are still on the phone. The call will not realease, and the car will not go into sleep mode.

BT is definitely tempermental.

I do have a 545, but can't see how that would make a difference. Are the CIP releases engine specific. I guess that would make sense, but had not heard that.