[Webkit-unassigned] [Bug 222053] New: localstorage randomly unavailable between 2 requetes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=222053

            Bug ID: 222053
           Summary: localstorage randomly unavailable between 2 requetes
           Product: WebKit
           Version: Safari 14
          Hardware: iPhone / iPad
                OS: iOS 14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: luc at acquire.app

Hi, 

I am facing a random issue that I and my team cannot reproduce, but that happens to some of our customers (recorded sessions with logrocket)
It appears only on IOs Safari 14, most often (99%) in-app browser (like Instagram).

Here an example of user agent that get this kind of error: 
-Mozilla/5.0 (iPhone; CPU iPhone OS 14_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 Instagram 174.0.0.21.119 (iPhone11,8; iOS 14_4; fr_FR; fr-FR; scale=2.00; 828x1792; 271836321)

-Mozilla/5.0 (iPhone; CPU iPhone OS 14_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.2 Mobile/15E148 Safari/604.1


In console logs and javascript mutations logs we can see that:
-the local storage is defined and used in some requests (request headers - x-my-token)
-suddenly, a request (sometimes the same has previously worked) try to use a localStorage value but all values are undefined.

We check in our code, we never override or delete the value of any localStorage value.
There no similar errors in all other browsers.

Here is an url where the bugg appear: https://buy.respire.co/3ffd2486-fa08-4852-8dcc-d99f2a0556a7/

If someone gets the same problems, any help would be greatly appreciated.


Thanks & happy codding

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