I don't know if it could help you, but you will find the two debug files , I have done, with adb you mentionned (I didn't know adb procedure ) :
One for the phone with the BTClient bug , and another one with the tablet where all is OK .Same APP of course .
What I did during those test debug period is : open the APP ( BluetoothClient_AI2test_withConnection ), connect to one BT device , and stop .
I am wondering if someone else has also, like me, this new trouble with BT classic when Calling Bluetooth Client Adress finally ? Could it be useful to gather who has the same trouble and in which type of Android device ?