Versions

Betweenlands version:

3.8.0.

Forge version:

Singleplayer or Multiplayer:

Singleplayer.

Installed mods:

Making a modpack.
I'd give the list of mods, but I've tried this with just the following mods, and the same thing happens, so no point.

Link to full crash log:

N/A

Description of the problem

How to reproduce:

Install this mod along with Better Combat Rebirth.
Grab a Valonite/Ancient greataxe/sword, and put it into your offhand slot.
Put a sword/other weapon/other item in your mainhand.
Right-click. You should see the axe render on the top of the screen, as stated below.

Expected result:

The axe not swinging on the top of my screen.

Actual result:

The axe swinging on the top of my screen.

Pictures: