Preview has recently changed for the worse.

Hi. Preview seems to be broken a little:

1) no way to change animation. Animation just stops and no preview of other within current file (state machine)
2) I'm using png/webp sequences in some of my projects and my recent project just started flickering on the first instance of the animation preview. Seems like webp files are loading in cache on 1st play, and only on 2nd play everything go smoothly.
I've checked my old files (no flickering were month+ ago) and they are flickering on your preview too.

3) Please take a look at this preview, where you can choose state machine, animation and no flickering presented with raster graphics: https://michalkurzewski.github.io/rive-preview/
Nice sample to recreate on official website.