Forge version: 1.17.1 modpack version
Twilight Forest version: 4.0.655
Link to crash log: (please use a paste site such as gist, do not attach the .txt or paste the log inline)

Steps to reproduce:

1. go to the twilight forest. then search around, opening up more chunks than you can possibly keep track of. then try to save the world or log out.

What I expected to happen: i expected to log out and it save like normal.

What happened instead: it was stuck on the saving world screen, delaying the crash, and i had to close out of the launcher. i couldnt take a screenshot because of this.

this is around the area i reloaded my world into. its usually around the 20,000 x or z coordinets, and possibly -20,000 as well

x-524 z19961 Thanks!

at least, thats what im gathering with what has been reaccuring. and the screenshots.

also, your welcome

Closed as duplicate, see #1272 for future resolution