Hello. Your mod is one of four mods in my list that create a significant amount of lag under certain conditions. I have linked an example video where I am standing on Muluna and placing ghost belts on top of ghost belts. The net result is no change. However, holding the mouse button down and dragging the mouse around causes a SIGNIFICANT increase in processing time. It's effectively possible to denial-of-service the server by placing ghost belts on top of themselves.
I do not know if your mod is specifically responsible at current time, but yours stands out as one of four contributors to this problem.
https://youtu.be/zToIFnLUa1U