Since upgrading my Fairphone 4 to Android 15 the Zepp app which runs my Amazfit watch keeps losing the Notifications permission. I have to go into the app and regrant the permission at least once a day, sometimes more often!
I have uninstalled & reinstalled the app but I can’t find a way to stop Android removing the permission.
Newer Android versions remove permissions if the app is not using them, but it shouldn’t happen this often, so it’s probably a bug.
Try going into Settings > App > Show all apps > Zepp > Permissions, then scroll down and disable “Manage all if unused”. If it’s a bug with Android’s permission removal, them this should fix it.