I occasionally use Photoshop to tweak/enhance video and do things that can't easily be done in After Effects.
Until the latest version of Photoshop (21.1.1), I could preview video by hitting the timeline play button. PS would often slowly 'render' the timeline, then it could be played in real-time. With 21.1.1, when I hit play, PS gives me every 10th or 15th frame. You can see the little green markers spaced out irregularly at the top of the timeline.
Is there some setting I'm not finding? Or has Adobe snuck in a new "feature?"