1240690 - Icons(hart, clock and paper airplane) background color are broken on Vimeo.com when quickly mouse over them

Status: RESOLVED DUPLICATE of bug 1227327

(Core :: General, defect)

Description

[Alice0775 White]

Attachment: screenshot

[Tracking Requested - why for this release]: Visual regression since 45


Build identifier:
https://hg.mozilla.org/releases/mozilla-aurora/rev/20d95004d8d18062255a9b4afa37b447b282a248
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0 ID:20160118004007

When I test Bug 1240680, I found a rendering glitch.
Reproduced on Nightly46.0a1 and Aurora45.0a2 with/without HWA.

Reproducible: not always, but easy reproducible. Once happens, it seems persists.

STR:
1. Load https://vimeo.com/ and logged in
2. Scroll down to the video thumbnails.
3. Quickly mouse over icons(hart, clock and paper airplane) 

Actual Results:
Background blue color does not render properly
See attached screenshot

Expected Results:
Background blue color render properly

Regression window:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=097cac1912b9658ba68389b5dd72d4cc45e762d5&tochange=21cabf6ab3e9a254cdc9370986f300213b346cb2

Via local build,
Last Good: b0a00d6915bb
First Bad: 21cabf6ab3e9

Regressed by: 21cabf6ab3e9	Markus Stange — Bug 1201327 - Don't repaint the whole frame subtree when background-position changes. r=dbaron

Comment 1

[Alice0775 White]

Reproduced on Ubuntu.

Comment 2

[Sylvestre Ledru [:Sylvestre]]

Tracking as it is a visual regression on a major website

Comment 3

[Markus Stange [:mstange]]

They're changing background-position on a button element, so this is the same as bug 1227327.

Comment 4

[Liz Henry (:lizzard) (relman/hg->git project)]

Tracking this in the duplicated bug where I will note that this also affects vimeo.