I use the latest version of mystical agriculture in a custom modpack on a server.

Every craft that use infusion crystal cause lags when crafted by stacks. This implies lag for 3 seconds and rollback to 3 seconds back to the time the craft was made.

Thanks for helping me.

Crafting is laggy in general in 1.12, nothing I can do about it

I mean, it's the only mod that causes lag and only crafts that evolves this particular item...
Every other crafts of the mod works well even if we craft 200 at the same time

Any other container items would cause the same lag, there isn't anything I can do about it sadly.