My Pebble 2 will only connect for an hour, and then stop… Then I have to turn the watch into airplane mode and turn back on again to get my notifications to come through my watch. I guess this is it… They are slowly starting to phase it out. I wonder whats going to happen in June
It might be your phone. Try restarting the phone, and see if that helps.
Also worth trying is to unpair (forget) bluetooth connection on phone and Pebble, then repair again uing the app.