When you place this over the receiving window in the crusher, grinder or extraction furnace, it lights up green, but if you try to process it in any of these devices you get a message that it cannot be processed in this device.
Yep. I was raising this more as a bug. I’ve been assuming that if an item causes the receiving window in a processor (like a grinder or a campfire) to light up green (as opposed to red), that means it has some sort of role to play using that processor. If the window stays red, that means you can’t use the item. I hope that’s right.
If it is, it seems the grinder, crusher and extraction furnace are not correctly responding to Common Reedmace.