Minecraft Version:1.11.2
Inventory Tweaks Version:1.62-dev-77

When I run out of seeds or a block, it seems that my stack does not automatic refill. I have tried switching the option on and off; did not fix the problem. This problem also includes refilling tools.

I am having the same issue. Even removed all mods except Inventory-Tweaks. But still broken. Sorting is working and I can edit mod options in game so it is loading the mod and it's working, except this feature.

I'm also having this issue. It's a dealbreaker, honestly