When having an animation painted, and you start playing it, the animation will cache. This is normal. However, while caching it'll stop playback, meaning that you have to press play multiple times. As a sidenote, the 'this frame is cached' indicator is far too difficult to see on both light and dark themes. I bet most people don't know about it's existence. Reproducible: Always The link I gave above has this problem at about 9:30 in.
Git commit 0877aecb3b251b38c361a67a8bcce81d293dd76f by Dmitry Kazakov. Committed on 16/05/2016 at 18:06. Pushed by dkazakov into branch 'master'. Make the cached-frame indicator more contrast M +3 -1 plugins/dockers/animation/timeline_color_scheme.cpp http://commits.kde.org/krita/0877aecb3b251b38c361a67a8bcce81d293dd76f
Git commit 1cb60a6987d83b4e1524d997268cf987f359effc by Dmitry Kazakov. Committed on 16/05/2016 at 18:35. Pushed by dkazakov into branch 'master'. Fix animation not stop on the first absent frame Fixes T2511 M +2 -1 libs/ui/canvas/kis_animation_player.cpp http://commits.kde.org/krita/1cb60a6987d83b4e1524d997268cf987f359effc