Cannot set mob animations

I created a custom texture and model for a mob in Blockbench and exported both files to MCreator. Everything seems fine except when I booted up Minecraft, it seems all the animation the mob is supposed to have do not work. I checked and realized after setting and saving my animations, MCreator would just reset the animations I had selected, reverting them back to 'no animation selected'. I am using MCreator 2021.1. Is this a bug or something I'm doing wrong? Should I try and see if using the latest snapshot would help?