Issue occurs when right-clicking on a drum with a bottle of sulfuric acid.

Expected behaviour:

1. Bottle in hand empties
2. Bottle contents are transferred to drum

What actually happens:

1. Bottle in hand remains full
2. Drum GUI opens
3. Drum displays correct amount of sulfuric acid in both the block render and the GUI tank, however JADE shows the drum to still be empty. Causing the drum to update resets the GUI tank and the block render back to empty.

Tested with buckets, bottles, and other fluids. Issue only occurs with sulfuric acid bottles. Tested in a large custom modpack, was unable to test standalone with only TFC as adding Artisanal to my clean install causes a rendering overlay crash on startup.

Did you add Patchouli to your clean install of TFC? That might be the source of the error

I can't remove Patchouli, it's a hard dependency for TFC

I tested it again and I can no longer reproduce the issue. I didn't change any mods so idk what happened.

The issue that you had indicates that the fluid was able to enter the drum on the client side but not on the server side. No idea what caused it, since I thought I'd patched that bug in dev. Weird. Anyway glad you were able to resolve it.

Update: Nevermind, it was a different Drum bug, and happens whenever you newly place a drum. You then have to relog and then it works, until you break and place it again.