We are seeing a performance hit from the Architect Event Subscriber.

Nobody on the server is even using Architect yet, to my knowledge there are no blocks crafted or placed at all yet.

Architect-MC1.12-1.2.0.6

Will remove the mod from my pack until its fixed, would love to work with you to fix performance issues when you become active again.

Sorry I didn't get back on this earlier. Haven't seen this before, and testing with what setups I have here, the Architect event listener barely even shows up in profiling. Does this happen after a while or already right after starting the server? Is this a modpack I can download from somewhere to try and reproduce the issue?

Seeing the same problem. It doesn't happen right away, but did happen after a week of play.

Removing the mod for now.