... Or call it Schrödingers' Vat.

However, I built myself a mice little Vat in a custom modpack on a multiplayer server.
But I don't get the Vat to work.
After some testing in Singleplayer, I got it to work there.

Using the Create Goggles, I can see the phenomenon below.
Jade (at the top) is telling me that there are 8 Bauxite powder in the vat (which is true as soon as I dump it, I get those back.)
The Create goggles tell me, that some Aluminium has already been created.

I have CO2 output and electricity both hooked up the way I've seen it in tutorials and they seem to work.
The smart chute at the bottom only block the bauxite powder.
Relogging doesn't help either.
Lastly, there is no other mod in the modpack that adds Bauxite or Aluminium, so I couldn't have mixed them up.

Thatnks for your help!
It's still a great mod you got there!

Edit:
I am using NeoForge on Minecraft 1.21.1 with TFMG 1.0.2f

Try funnel brass or andesite on any side. Also on screenshot - there is Dioxide inside - which means that you are not pumping it out.
I have it like this - everything works. TFMG 1.0.2f (neoforge 1.21.1)

i have the same issue on multiplayer, singleplayer it works just fine. im on forge 1.20.1 1.0.2c

Update:
The next day it worked. I don't know how, nor why and the server didn't restart either. (I asked out admin.)
After some fiddling with updating the power network, I got it to work flawlessly.

The Carbon Dioxide that's supposed to be in there isn't real, same with the aluminium. When I looked away and back at it, it reset. Also, the CO2 builds up to 4.000mB (Found that out once it worked.)
Oh, and the chutes work properly. Just with the "real" Items, 8 Bauxite in my case.

I suspect something with multiblock detection running slower (or into more errors) on the server than on the client. This is a wild guess though.