Gear plugin keep on asking for the credential on my phone again and again which has cause drain my phone's battery. I have oneplus 6t with Android 10. It really very frustrating and stopping me to use the Galaxy watch.
Login & report the issue via the Contact Us link below. (Once you submit it'll go into the My Questions section if you logged in.)
I just reported my issue, awaiting feedback. Maybe the more we log this in the more chances are of fixing it?
Yesterday I create new samsung account and the problem is solved. On the login screen I tap create account and follow the instructions. Then I signout in samsung health and use the new account to login. No data loss and everything is working fine!