We got the WKWebView here, but interestingly it remains transparent and shows up nothing.

Is it possible this is a 13.5 beta issue?

Is it possible this is a 13.5 beta issue?

Likely, but I could not get to the conclusion now.

We intentionally hide the WKWebView on launch and unhide it on webView:didFinishNavigation: delegate callback to prevent the initial flash on dark mode.

It took significantly longer time for a hidden webView to reach this delegate call. For most articles, this takes about 0.5-1 second, which should already been considered abnormal. For certain articles, it surprisingly takes 30 seconds or more.

A non-hidden webView seems to work fine.

I'll see if this could be reproduced with my other Macs (have to be upgraded first, though).

I had forgotten that we did this trick on the Mac. We might want to change this to work the same way that I recently did for iOS.

This issue is not related with the beta OS. It's caused due to WKWebView sends webView:didFinishNavigation: when all resources are loaded, which waits until all images to be loaded (or times out, for my case).

It should be easy to reproduced with Network Link Conditioner.

Simply changing didFinishNavigation: to didCommitNavigation: would be sufficient to fix this issue while preserving the flashing fix for dark mode. I'll raise a pull request after testing.