Here is the crash log:

https://gist.github.com/mrtopf/fc41fa5b1e169624cf952f049f6d94c3

( I deleted some mods before that but their item shouldn't have been in any inventory if that is important to know).

also looking at the code: I might have changed the chest size in the config after creating chests. I am just not sure if I didn't start the world after the change or not.

Found the issue, fixed in dev.