Observed behaviour

Occasionally, when attempting to move an item from the toolbelt to my offhand, it will move the offhand item into a separate empty inventory slot in the toolbelt instead of the one the item replacing it was in. If this happens while the toolbelt has no empty slots, the item previously in my offhand will be deleted. I'm not 100% sure what causes it to prioritize placing the offhand item in other toolbelt slots instead of the slot where the item replacing my offhand item was, but it seems to mostly happen when replacing a tetra tool with another tetra tool.

Expected behaviour

When attempting to move an item from the toolbelt to the offhand while already having an item in the offhand, either the offhand item swaps places with the toolbelt item, or nothing happens at all.

Steps to reproduce

1: craft a toolbelt
2: fill every available item slot in the toolbelt (this was done with a freshly-crafted rope belt, with the standard two rope loops it comes with)
3: put an item in your offhand
4: swap an item in the toolbelt with the item in your offhand, in a way which causes the belt to choose an inventory slot other than the one which held the item you just swapped (still can't figure out what specifically makes it do that, it seems to come and go sporadically) (Update: I think it might have something to do with the belt inventory GUI, the one which can defaultly be accessed with alt+B. I noticed it happening today after I used that inventory screen to put something in a quickslot.)
5: There is now an empty inventory space in the toolbelt where the offhand item should be, and the offhand item is gone.

Crashlog

No response

Tetra version

6.8.0

mutil/mGui version

6.1.1

Forge version

1.20.1-47.3.33

Other mods

This was part of a custom modpack of my own making, just for fun.

• Let's Do NetherVinery 1.2.17
• Let's Do Vinery 1.4.38
• Alex's Delight 1.5
• Alex's Mobs 1.22.9
• AppleSkin 1.20.1-2.5.1
• Architectury API 9.2.14
• Balm 7.3.18
• Better Advancements 0.4.2.25
• Better Combat 1.8.6
• Blueprint 7.1.1
• Bookshelf 20.2.13
• Citadel 2.6.1
• Cloth Config 11.1.136
• Clumps 12.0.0.4
• Cobweb 1.0.1
• Comforts 6.4.0
• Controlling 12.0.2
• Create 6.0.0
• Curios API 5.12.1
• Enchantment Descriptions 17.1.19
• End of Mending 1.0.5
• End's Delight 2.4
• Explorer's Compass 1.3.3
• Farmer's Cutting: Quark 1.0.0
• Farmer's Delight 1.2.7
• Farmer's Respite 2.1.2
• Fast Leaf Decay 32
• Ferrite Core 6.0.1
• Immersive Weathering 2.0.5
• Jade 11.12.3
• Just Enough Items 15.20.0.106
• Kotlin for Forge 4.11.0
• Macaw's Bridges 3.0.0
• ModernFix 5.20.2
• Moonlight Lib 2.13.71
• Mouse Tweaks 2.25.1
• Nature's Compass 1.11.2
• Nether's Delight 4.0
• Patchouli 84.1
• PlayerAnimator 1.0.2-rc1+1.20
• Polymorph 0.49.8+1.20.1
• Quark 4.0-460
• Quark Delight 1.0.0_forge_1.20.1
• Quark Oddities 1.20.1
• Searchables 1.20.1-1.0.3
• Small Tetra Additions 1.20-8.0
• Soul Fire'd 1.20.1-4.0.11
• Tetra Toolboster 1.0-1.20.1
• Tetra's Delight 1.20.1-1
• Tetracelium 1.20.1-1.3.1
• Tetranomicon 1.5.3-1.20.1
• Tetratic Combat Expanded 1.20-2.8.2
• The Endergetic Expansion 1.20.1-5.0.1
• Xaero's Minimap 25.1.0_forge_1.20
• Xaero's World Map 1.39.4_forge_1.20
• Yeetus Experimentus 2.3.1-build.6+mc1.20.1
• YUNG's API 1.20-Forge-4.0.6
• YUNG'S Better Nether Fortresses 1.20-Forge-2.0.6
• Zeta 1.0-24