I hope it's Ok to link a post from the game's own subreddit here. The source video is on my iPad and I'm writing from my computer right now (You could say I'm a bit lazy to reupload the video).
This happened to me twice after the Blue and Green levels, where you seed the garden with the Technicolor cube (apologies for the misnomer), and leave for the next level.
Here's my other post on the same subject, where you can view what I encountered.
Platform: Apple Arcade - iPad Pro 11.