A simple restart can often resolve temporary software glitches. Turn off your Galaxy Watch 6 Classic completely, wait a few seconds, and then turn it back on
Although the issue seems to be watch-specific, restarting your paired phone can sometimes help ensure a stable connection and rule out any phone-related interference
Watch: Make sure your Galaxy Watch 6 Classic is running the latest software. Go to Settings > Software update > Download and install on your watch. Phone: Ensure your phone also has the latest software updates in Settings > Software update > Download and install. Keeping both devices updated can resolve compatibility issues
check if any power saving modes are enabled that might be interfering with your chosen settings.
On your phone, go to Settings Apps. 2. Find and tap on Galaxy Wearable. 3. Tap Storage. 4. Tap Clear data
Factory Reset (Last Resort): If none of the above steps work, you could consider a factory reset