Some people are reporting similar problem here. Talk to Garmin maybe. It's not affecting everyone - we've 2 devices here and do not see the problem even with the latest firmware.
There's someone there collecting device numbers, not sure why as it is Garmin you need to be talking with...although they can be a little challenging to deal with.
Thanks! It looks like upgrading to 2.7 firmware causes this problem to a few watches.... Since this is the first time I've run OWS since upgrading, I was a victim.. i just downgraded back to 2.6.