In the latest version of the mod it does not allow me to store digimon in the V-pet anymore. Is that a bug?
It is not. I would suggest joining our discord. I have went in depth on the current way to use the v-pets in it. Basically the way they work now is a temporary fix to prevent you from losing digimon to server-side lag until the mod rewrite is complete. But again, all of that is in the discord.