Hello! Your animation looks amazing! :) We are sorry for the issues caused and thank you for reporting. This is definitely some weird behavior and it is possible that it may have to do with some kind of memory issue, but we're not sure. We'll do our best to investigate and fix the issues in a future update.
Are you able to add Pixelorama to the tool database? https://itch.io/suggest-a-tool
I turned the mockup above into my 1st game using Pixelorama. Thank you. https://houserule.itch.io/regen-rod