Hmm, I get this behaviour too but I thought it was a FP2 bug!

I have been ringing voicemail to solve this problem, thinking that it was a driver issue - when you end a call, the watch connects properly within a few seconds. Thinking about it, perhaps it's the segfault on end of phonecall bug that was mentioned earlier in the thread, causing the daemon to be started again, which makes the BT reconnect...lol.