On one watch we had to restart the watch twice before getting BT back.
On my watch it automatically reconnected in a minute or so, then lost it again, but for less than a minute. I didn't do anything to get it working.
Anyone found a long-term solution to this or do you all think we just need to hope for updates to the app? PS: I don't lose BT to my watch (that I know of) when it's within range and I'm not using MMR.