[Webkit-unassigned] [Bug 225083] New: PWA's / Home Screen Apps with Service Workers intermittenly fail to open offline

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=225083

            Bug ID: 225083
           Summary: PWA's / Home Screen Apps with Service Workers
                    intermittenly fail to open offline
           Product: WebKit
           Version: Safari 14
          Hardware: iPhone / iPad
                OS: iOS 14
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: Service Workers
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mike at reaviscode.com

On iOS/iPad OS 14.5 and 14.6 Beta, PWA/Home Screen Apps with Service Workers are intermittently failing to open when the iPad/iPhone is disconnected from the internet. Instead they return the error page: "Safari cannot open the page *web app url* because your iPad is not connected to the Internet" or "Safari cannot open the Page because your iPhone is not connected to the Internet". It is intermittent, and the Web App will usually open the first time after turning off the network, but eventually fail to open after closing and re-opening repeatedly. It seems to randomly open again if you keep trying, and will work in bursts (open offline perhaps 3 times in a row), before predominately failing to open again. I haven't been able to discern a pattern of when it does/doesn't work.

I am testing multiple PWA's that worked offline without issue in iOS 14.4 (like https://airhorner.com/)

I'm having the issue on both the 14.5 release (Mozilla/5.0 (iPhone; CPU iPhone OS 14_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1 Mobile/15E148 Safari/604.1)

and 14.6 Beta (Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.1 Safari/605.1.15))

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