Created attachment 194562 [details] Green rect disappearing on resize. * open the attachement, observe a green rect * resize the browser window * the green rect disappears
(this happens on ToT only)
Could be https://bugs.webkit.org/show_bug.cgi?id=106221 https://bugs.webkit.org/show_bug.cgi?id=108429 https://bugs.webkit.org/show_bug.cgi?id=112457 https://bugs.webkit.org/show_bug.cgi?id=112773 I think one of the latter 2 is most likely.
Scratch this, I was mistakenly using a binary built off a heavily modified branch. ToT is fine.