My watch won't work

Hello. Hope you can help. My watch is a Samsung galaxy watch and I gave a huaweai mate 20 Pro. When I change my watch faces the battery level on the phone doesn’t match and go down on my watch. The watch battery level doesn’t match the phone battery level. Help please.

Do you have this problem with all faces?

Just to be clear, there are two different battery levels that the watch can display, the level for the battery in the watch ( the watch battery level ) and the level of the battery in the phone ( the phone battery level ). Are both of these not showing correctly on the watch or just one of them?