[Webkit-unassigned] [Bug 255094] New: Infinite load on reddit.com

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255094

            Bug ID: 255094
           Summary: Infinite load on reddit.com
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Mac (Apple Silicon)
                OS: macOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Page Loading
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jon at jonshier.com
                CC: beidson at apple.com

Staring with STP 167 (Safari 16.4, WebKit 18616.1.8.2), reddit.com seems to get into some sort of infinite loading state that makes the whole page unresponsive. Even the web inspector is laggy. Switching away from the tab and back also breaks the rendering of whatever content was already downloaded. From what could see, loading started normally but then resources loaded beyond the first batch took forever to actually load (looked like about 50s in the inspector) and then the loading just kept going. During that time the UI isn't responsive, I can't cancel loading, nor can I reload. I can't bring up the context menu, and the inspector itself starts to become unresponsive.

I've confirmed Reddit works correctly in system Safari 16.4, Chrome, and STP 166 on another machine. I've also disabled all extensions with no difference.

Due to the inspector not really working either, I'm not sure how to investigate this further.

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