Describe the Bug

When a Smart Observer is attached to a Millstone and Wheat is inside, the Smart Observer apparently does not detect it and does not emit a Redstone signal. This behavior is consistent both with a Wheat item in the filter field and a filter with Wheat attributes attached to the Observer.

Reproduction Steps

1. attach Smart Observer to a Millstone
2. attach Wheat item or filter to Smart Observer
3. (optionally visualize Redstone signal)
4. insert Wheat to Millstone
5. "observe" no Redstone signal
6. (optionally repeat with other items like Flour or Wheat Seeds where there is a Redstone signal)
   ...

Expected Result

Smart Observer with a Wheat filter on a Millstone that contains Wheat should emit a Redstone signal.

Screenshots and Videos

Crash Report or Log

No response

Operating System

Windows 10 Education

Mod Version

0.5.1d

Minecraft Version

1.20.1

Forge Version

47.1.33

Other Mods

Farming mod: Croptopia 2.3.3
(Remaining mods on request, since feature worked as expected with other items)

Additional Context

No response

This is not related to wheat specifically, Smart Observers don't detect input slot of the Millstone (it has a separate input slot internally). I am not sure if Smart Observers are intended to detect input slots, but they do detect items in Furnaces for example.

@Lgmrszd I agree, I tried with sugarcane and sugar, same behavior. I had a look at the sources of Millstone Forge version and it appeared to me the bug could be located upstream, but in Fabric version the same. My use case was a conveyor belt bringing in the wheat that would reverse direction once there was no wheat left to mill. I assumed the separation of input and output slots had to do with checking the input against existing recipes. Thanks for the Furnace comparison.