[Q] can't switch back to earpiece if device is paired to bluetooth headset

Hello,

on my I9300 i have tried Slimbean 4.3 stable and SlimKat 4.4 weeklys now and i always had the problem that I can't switch back to speaker or earpiece if device is paired to a bluetooth headset or bluetooth speaker in my car.
This problem is also described in a posting in cyanogenmod forum. I cant post links but just search for "[10.1.3] Can't Switch Back To Speaker Or Headset Earpiece If ..." on google.

Until now I have found no solution. Does anyone have an idea how to solve this issue?
It works perfectly with stock ROM but I dont want to change back...

Thanks for your help
daveson