Description of the issue:

Using middle click when the toolbox is full of bottom row items voids all the tools (using Inventory Sorter mod)

Versions & Modlist

IE: 1.16.5-5.0.7-143
Forge: 36.2.30
Inventory Sorter: 1.16.1-18.1.0

Blocked by cpw/inventorysorter#119. AFAICT InvSorter believes that it should be able to freely swap around stacks since all slots are using the same Slot implementation, but that is simply not true in true in this case and IMO a bug in InventorySorter (though probably not easily fixable). The easiest solution would have been to mark these slot implementations as invalid for sorting using IMC, but that's broken as described in the linked issue.

Closing this because support for 1.16.5 has ended