Sometimes i have reports of force close on watch faces and im working on a fix. If right after installation of the software the watchface is crashing i usually advise to reinstall the software. And it works.
But we have recently found out (thx Javier) that if the watch is out of Bluetooth range from the phone and later tries to reconnect back within range of the phone the software crashes. The culprit is in the weather notification on the watchface that is causing the crash. If I turn off weather notification everything functions normally when the watch reconnects back within range of the phone.
We have since uninstalled and reinstalled the software couple times for testing purpose. A re-installation will temporarily fix the problem until the watch or phone tries to reconnect when they get out of range from each other. (Weather notification on)