Benoit Girard (:BenWa) Reporter
	Description • 10 years ago

I see some pages render incorrectly with APZC forced on. The easier to reproduce is my wordpress dashboard. The incorrect rendering is permanent. I'll look for a public testcase to reproduce.

	Benoit Girard (:BenWa) Reporter
	Comment 1 • 10 years ago

Better STR:
1) Open https://bugzilla.mozilla.org/show_bug.cgi?id=1013364
2) Mouse over the CC list (it should be scrollable)
3) Fling to scroll down

I also sometimes get a red square on the top right of the screen indicated APZC failures.

	Kartikaya Gupta (email:kats@mozilla.staktrace.com)
	Comment 2 • 10 years ago

In my case after I do these STR I don't see incorrect rendering, but I do see a giant green layer border around where you see the incorrect rendering, and my two-finger trackpad scroll stops scrolling the CC list and always scrolls the page.

	Kartikaya Gupta (email:kats@mozilla.staktrace.com)
	Comment 3 • 10 years ago

Some of the page content (e.g. crash signature, QA whiteboard) ends up on another layer that sits on top of the scrollable subframe for the CC list. Presumably this layer has some transparency and so we're not doing proper hit detection for this scenario in the APZ code. That would explain the behaviour I'm seeing. I'm not sure why for you the CC list disappears entirely, but it also looks like that layer has a darker background color for you, so maybe that layer on top is just painting over the layer underneath that has the CC list.

	Kartikaya Gupta (email:kats@mozilla.staktrace.com)
	Comment 4 • 9 years ago

The layerization and scrolling behaviour seems good now on the bugzilla page.