Created attachment 369286 [details] a screencast Example URL: https://kw8rl1pyn7.codesandbox.io/ Steps to reproduce the problem: 1. Open an attached url 2. Scroll a table header horizontally What is the expected behavior? A fixed white cell should remain in the same position What went wrong? A fixed white cell twitches (see the attached video)
Created attachment 369287 [details] a test page
<rdar://problem/50544505>
I am able to reproduce this issue with Safari in the simulator. When running the latest from the WebKit repository though, I cannot reproduce it. I think this might be fixed by one of the recent position:sticky improvements.