Minecraft version - 1.20.1
Mod loader - Forge - 47.4.2
Mod version - 1.8.6
I am using the latest version available - (as of 6/27/25) yes

Describe the bug
Using the toolbelts ability to swap tools into your mainhand or offhand causes a offhand item that is two handed to NOT be added into the toolbelt when swaping the offhand inventory with it (though the two-handed weapon swaping out of the belt works TO CLARIFY; for now...)

To Reproduce
Steps to reproduce the behavior: this may be a bit complex

1. Familiarize yourself with your keybinds by looking at the keybinds added by tetra (the mod Controling will make this 100x easier to locate) Proceed to Step 2 once you know the keybinds
2. in the creative menu, search "Rope" and grab the item that's named it; this is the basic level of the tetra toolbelt, and this will suffice.
3. get a weapon that has the better Combat attribute Two-Handed and put it into your offhand
4. This can be done in two different ways at this point, both should cause it

Method A:
I. grab another item (doesn't matter though have it be non-two-handed to keep it consistent)
II. Either press the Open Toolbelt keybind and place that item in there or use the Restock Toolbelt keybind while
having the item selected to put it into the only avalable slot quickly
III. While holding the Quick Access keybind, use the cursor and hover close to the item; once you see the item name pop up, make sure your cursor is on the LEFT side of the render and then release the Quick Access keybind (if you look closely, you will see a little lit arrow pointing towards the side your cursor is located, this indicates what hand will be swaped)

IV. Open the toolbelt (either by pressing the Open Toolbelt keybind or using the item in your hotbar). You will observe that the Two-Handed weapon you had swapped out of your offhand is not in it, despite the item that was in the toolbelt now being in your offhand.

Method B:
I. Press the Restock Toolbelt keybind while making sure you have nothing in your main hand (the Restock mechanic takes priority over the main hand over the offhand)
II. Open the toolbelt by using it in your hotbar or pressing the Open Toolbelt keybind, and find that it's empty. This shouldn't be the case, and means you replicated the bug using the second method
6. Bug Recreated

Expected behavior
The behavior that's intended should be self-explanatory

Screenshots or video recordings
If applicable, add screenshots to help explain your problem.

Additional context
Install a mod that adds Two-Handed weapons or create a custom item via a datapack to behave like a Two-Handed weapon

if trouble reproducing, let me know and ill give you a video of it