I had a big texture pack mod along with small other packs. They worked well, i made small packs to overwrite some textures from the big one, i managed it very carefully to make them work alongside each other. But after the update the big mod started overwriting every other small package. The cloud mod that I have, got overwritten by another mod, jhowever before I managed it so that wasnt supposed to. I had two movement sets animations working together well, i used one for walk/idle, another one for running. After the update one mod completely overwritten the other one. It simply doesnt even allow me to fix it. And yes, it purges after EVERY change, even after reinstalling the mod, and it takes a lot of time to do both deployment and purging that vortex does for no entire reason. I genuinely think it's a bug and not some kind of a new feature. It purges after ANY CHANGE, and requires a DEPLOYMENT, that just sets the mod back into its state, overwriting other files.
