Mod Version:
1.12-3.4.7.1

Forge Version:
1.12.1-14.22.1.2485

Optifine/Foamfix/SoundFilters
C5/0.8.0/0.10

Link to crash log (if applicable):
https://pastebin.com/2z47M41e

Description:
Just playing around. Placing dirt and srcolling between items in hotbar

Closing due to inactivity. If the problem still occurs reopen with an attached client log. Thanks!

Would you happen to have the client log for when this occurred? It's an odd one and I need more clues. ;)

@Blatts12 How often does this crash occur?

Actually only once