Clicking on the button after filling up every other slot that's not used for ingredients or output of set recipe with random items(cobble, stone, torches etc.) also locks up player's inventory. It becomes impossible to move items around in player's inventory with crafter GUI open unless it's an item that was remembered in crafter's buffers. I also recall this bug being present in 1.15 version
System information:
Minecraft: 1.16.5 Forge: 36.2.2 jei-1.16.5-7.7.1.118 mcjtylib-1.16-5.0.22 rftoolsbase-1.16-2.0.11 rftoolsutility-1.16-3.1.2 AdoptOpenJDK 11 Xeon x5460 GTX 650
Description:
Clicking on the button after filling up every other slot that's not used for ingredients or output of set recipe with random items(cobble, stone, torches etc.) also locks up player's inventory. It becomes impossible to move items around in player's inventory with crafter GUI open unless it's an item that was remembered in crafter's buffers. I also recall this bug being present in 1.15 version
Video demonstration:
https://user-images.githubusercontent.com/8050905/136450396-a6ec76c9-b9ad-4f22-b932-a175c2608e62.mp4