With the mod installed, smelting stacks of items in any type of furnace no longer works correctly. It will smelt the first item, and then not continue until that item is taken out, making it possible to unknowingly waste a lot of fuel, and making it much more tedious to smelt items. This behavior immediately stopped upon disabling the mod, and all furnaces functioned normally again.

Hi!

I am unable to recreate this issue. Could you share more information on how to reproduce it?

• What other mods are you using?
• Which version of Minecraft are you on?
• Does the issue happen when only using Fabric API & Item Components?

It's taking me a lot longer than I expected, I'm going to keep going at it but in case I don't find the cause tonight, I'll leave my modlist in case you want to sift through what mods could be causing it.
modlist.txt

I'm on Minecraft 1.21, Fabric Loader version 0.16.5 and API version 0.102.0. I have done further testing since my original report, and it doesn't happen with just the API and Item Components. Unfortunately my modlist is quite large, so to not inconvenience you, I'm going to attempt to find exactly which mod is conflicting and causing the issue instead of dumping my massive list of mods onto you, I'll get back to you when I've found it.

hey i have a quite similar modlist and im also experiencing this issue with items not stacking in a furnace, have u found the mod thats causing this by any chance?

I have not yet found it, no, I had to stop searching last night due to a migraine from having worked all day, but I hope to continue looking sometime today. If you can you should try to find it as well, more people with the issue looking for the cause would make this much faster to find.

try disabling oωo

aside from this issue, it needs /reload everytime I load a new world after starting minecraft,
(at least for stackable items in order to exceed 64) but it doesnt need it when you exit a world and rejoin.

Finally made time to test this for myself, it is indeed oωo being present causing the issue. Renaming the issue to reflect this, hoping it's fixable since I use quite a few mods that require it.