Created attachment 389408 [details] Testcase Attached test case shows the text in the box leaving pixel trails.
I don't see a pixel trail in Safari 14608.4.9.1.4 on macOS Mojave, nor with STP 98. Is this a regression?
Only seems to happen on non-Retina.
Cannot reproduce with Safari 13.0.5 of Mojave, can reproduce with STP 99.
<rdar://problem/59124327>
Created attachment 389682 [details] Non-compositing testcase