Movie clip isn't stopping when requested

Seems that calling gotoAndStop(framelabel:String) on an embedded movieclip is not sticking. If I call gotoAndStop() on every update, then that solves the problem. Not ideal. Is this a limitation of OpenFL?

The swf is comprised of multiple movieclips with timelines, if that makes a difference.

Are you using TypeScript port ? I encountered similar problems with TypeScript port of openfl ?

No. We’re using the Haxe version 8.9.1.

Does this occur with any animation (like the Nyan Cat sample) or is there any other thing required to reproduce? Thank you