Hi! I'm working on a modpack which contains your mod, and I was doing some testing. I died and when I respawned nearby, it was in newly loaded chunks (one of the mods makes you spawn nearby your death instead of at your bed). At this point, the game hung up completely. Commands didn't work, blocks didn't break, etc. I had to force close the client because it got stuck on "saving world" when I tried to exit.

Here's my latest.log: https://gist.github.com/katubug/0682401f7ada6fc429615815d6fb3fd7

I included the full file, but since it's huge and spammy, I added a second file to the gist, which is just the relevant excerpt.

Thanks for your time!