[Webkit-unassigned] [Bug 211681] New: [iOS][WKWebView] Going back to the web view screen, scroll down and up to view the loaded images. The image will break for unknown reason

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211681

            Bug ID: 211681
           Summary: [iOS][WKWebView] Going back to the web view screen,
                    scroll down and up to view the loaded images. The
                    image will break for unknown reason
           Product: WebKit
           Version: WebKit Local Build
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Images
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dh.chong at outlook.com

Created attachment 398955

  --> https://bugs.webkit.org/attachment.cgi?id=398955&action=review

Demo Project

I've contacted DTS and they think it should be a memory leak bug.

We're building a custom WKURLSchemeHandler to delegate image loading and link clicking into native app for better user experience.

However, if we tap the links to open Safari, then go back to the web view screen, scroll down and up to view the loaded images. The image will break for unknown reason.


Our app is not a pure browser. It is just like a read-it-later app that needs to customize the image and link loading logic. 

STEPS TO REPRODUCE 
1. Use my demo project.
2. Build and run it on your simulator or device
3. Go to "Demo 1" to view the web view
4. Scroll down for descriptions
5. Tap any link of the web page
6. Observe the first image of the web page, if the image still exists, just scroll up or down.
7. The image breaks.

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