Well, I had the same problem once. I could solve it, in which I
- deleted all the app’s data on the watch (watchsettings - uninstall aplication - choose watchdroid - end aplication - tap storage - delete data - then delete aplication).
- same procedure on your mobile.
- then goto bluetooth setting and delete device.
- After that reinstall the apps on your phone and your whatch.
- pair it again as desciped. (No Bluetooth pairing).
- At least restore the needed settings (disable battery saver etc)