Observed behaviour

I've found it accidentally

!!!Warning!!!
Don't pickup things, that are lying in the material slot
!!!Warning!!!

Expected behaviour

https://youtu.be/77-umZf2Bq0

Steps to reproduce

What we need:

1. Tetra workbench
2. Put a tool into it and choose any part, that we can switch
3. Put what we want to dupe in material slot
4. Fill the invetory fully
5. Choose another part
6. And again
7. We get it!

Crashlog

No response

Tetra version

0.39.1

mutil/mGui version

000

Forge version

14.23.5.2860

Other mods

No response