We’re seeing very similar behaviour with Big Rigs Camp Finder, an installed Home Screen PWA. Current real-device results on iOS 27: • Geolocation works correctly in Safari. • The installed Home Screen PWA also works when iOS allows access. • However, iOS periodically presents the native location permission prompt again even after location has previously been allowed and working. • We have also seen the Home Screen PWA become stuck returning PERMISSION_DENIED while Safari continued to work. • Reset Location & Privacy restored the existing installed PWA without reinstalling it, but the repeated permission prompt later returned. • We added diagnostics and repeatedly captured this state in the Home Screen PWA: getCurrentPosition(): success navigator.permissions geolocation: denied display-mode: standalone geolocation available: yes So the Permissions API state does not reliably reflect the actual result of the geolocation request in this context. Our implementation is user-gesture driven: • no geolocation request on app startup or mount • getCurrentPosition() only after the user taps Locate Me • watchPosition() starts only after the one-shot request succeeds • no automatic retry loops or polling Safari remains stable while the standalone Home Screen permission behaviour is inconsistent. Happy to provide screenshots, timestamps, or further reproduction details if useful.