I understand that when you use Messages on your Apple Watch, a name will often "stick" to the top and overlap other text that's shown. I'm happy to provide some help for this issue.
I recommend that you follow steps 4-6 in the following article:
Get help with your Apple Watch - Apple Support
Unpair your Apple Watch and iPhone
On your iPhone, open the Apple Watch app, tap the My Watch tab, then tap your device at the top of the screen. Tap the i icon next to the watch that you want to unpair, then tap Unpair Apple Watch.
Erase your Apple Watch
After your devices unpair, you should see the option to pick a language on your Apple Watch. If you don’t see this screen on your Apple Watch, go to Settings > General > Reset. Then tap Erase All Content and Settings.
Pair your devices again
Use these steps to pair your Apple Watch and iPhone again. Put on your Apple Watch, and keep your Apple Watch and iPhone close together as they sync.
If you still need help
Remember to keep your Apple Watch, iPhone, and apps up to date.
If you already tried these steps, contact Apple Support.
Thanks for using the Apple Support Communities. Cheers!