itch.io

Well that's probably where the issue comes from. 1.3 adds alot of features to the aseprite api and I've potentially used some of them. I will look into this asap. 

I personally never had any issues with the 1.3 beta, so if you don't rely on plugins only compatible with 1.2.4, I'd recommend you give the beta a shot :) 

Thanks for bringing this to my attention!