Bug 114783

Summary:	Resuming Animations with animation-play-state Will Cause a Flicker
Product:	WebKit	Reporter:	Gias Kay Lee <gsklee.of.planet.earth>
Component:	CSS	Assignee:	Nobody <webkit-unassigned>
Status:	UNCONFIRMED ---
Severity:	Normal	CC:	dino, simon.fraser
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	PC
OS:	All
URL:	http://stackoverflow.com/questions/15627732/css-animation-play-state-issue-animation-jumps-back-to-initial-frame-when-resum

Description Gias Kay Lee 2013-04-17 21:09:08 PDT

On slower machines the flicker can be clearly identified as a sudden rollback to the first keyframe, before the animation picking up properly from where it was paused. More info inside the Stack Overflow link.