Watch TestFlight app became unlaunchable every morning; unpair/re-pair fixed it for me Sharing this in case it helps someone with a similar watchOS/TestFlight issue. In my case, the iPhone app was fine, but the watch companion app became unlaunchable by the next morning. Tapping the app icon on Apple Watch did nothing, and reinstalling temporarily fixed it until the next day. I collected multiple co-sysdiagnose captures and repeatedly saw this pattern: Watch app installs and is launch-enabled Overnight/early morning, phone-side TestFlightServiceExtension fetches watch profiles It then removes the active watch provisioning profile (removeProvisioningProfileWithID) Watch-side AppConduit logs show removal of the same profile UUID After that, the watch app is effectively “untrusted”/won’t launch What fixed it for me: Unpair Apple Watch from iPhone and re-pair Important: for me, I did not need additional steps like deleting TestFlight or deleting/reinstalling app first — unpair/re-pair alone resolved it. My exact root cause may not match everyone’s, but if you have a repeating “works after reinstall, fails next morning” watch TestFlight pattern, unpair/re-pair is worth trying.