[Webkit-unassigned] [Bug 227625] New: Reload of MobileSafari and WKWebview when response is received

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=227625

            Bug ID: 227625
           Summary: Reload of MobileSafari and WKWebview when response is
                    received
           Product: WebKit
           Version: Safari 14
          Hardware: iPhone / iPad
                OS: iOS 14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Page Loading
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: thorsten.wolf at neptune-software.com
                CC: beidson at apple.com

Created attachment 432790

  --> https://bugs.webkit.org/attachment.cgi?id=432790&action=review

Logs of Console.app

We experience unexpected reloads of webpages viewed with MobileSafari and WKWebview when a response payload is received via XMLHttpRequest.

This reload doesn't happen on an iOS Emulator or Safari on Mac OS or on other browsers but it is reproduceable in our App (build using the Cordova Framework and WKWebview) as well as the iOS Mobile Safari.

We tried the following constellations:
- iPhone 11 Pro with iOS 14.6
- iPad Mini 4 with iPad OS 15 Beta 2
- iPad Air 3 with iPad OS 14.6
- iPad Air 1 with iOS 12.4.9

Reproducing the issue:
Open webpage: https://template.neptune-software.com/neptune/sdk/exp_sample_odata_jsonh_v4.html?sap-client=800 in Mobile Safari and press the button "Fetch 25k Entries".

I attach the log of the console.app with the filtered entries for "Errors and Issues" for the timeframe when the reload happens.

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