Hey mate, there is a dupe with your nullifiers.

1. Put an item in ur nullifiers
2. Drop the nullifier by pressing Q. (The GUI will stay open and you can take out ur item)
3. Pick up the nullifier again and take out ur duped item.

Maybe you should add a check if the item gets dropped to close the GUI or block dropping it while GUI is open to fix this

-Tazz

I am unable to replicate this issue.

the nullifier isn't dropped when pressing Q.

i will try to reproduce it again (this was on Foolcraft Version 1.3.3) maybe it got fixed inthe latest version, im not entirely sure

Note that 1.10/1.11 are no longer supported, so this bug would be fixed in 1.12 if it's an issue :)

okay, then this can be closed, maybe thats the case, that its fixed in 1.12 thanks for the quick respond tho