[awesomebilly]

I'll be posted what I've tested so far .. after I get to work:

Steps to reproduce:

Open the Alchemy crafting table (don't need to craft anything)
Have the addon show your available traits to learn
Press escape (It currently works)
Open Inventory with I
Split any item into two stacks

Result:
Escape bug


Few things I've tested (I'll post more)
1. Its not the UI (I have it completely disabled)
2. Its for sure inside:
local combinations = Alchemist.Algorithm.get_optimal_combinations(inventory, num_reagent_slots)
--- I've debugged in the Algorithm quite a bit, but I need to dig deeper.

I believe the bug happens with Alchemist once you've crafted and the item is being removed from your inventory (Hence the stack split bug).

I'll update more when I have time,

Thanks so much guys!