When i install a Facer watchface it initially installs on my Gear S3 and Recents in my watchbox but if i go to another watchface on my Gear S3 and try to come back to the one i just installed it’s gone. It’s still on my phone but gone from my watch. If i want to use it again i have to install it from my phone or go back to its original listing. My phone is a Galaxy S8+.
The first thing I would try is restarting the watch and then reinstalling the watch helper app in case it has become corrupted. If all else fails contact @Facer_Official at: Submit a request – How can we help? or email them at: facer-support@little-labs.com