Since 0.2.20 The Large Mixing Vessel stopped mixing any recipe other than not programmed ones.
Example Niobium Titanium Dust Programmed to 1.

Or Soldering Alloy Dust Programmed to 3 also not processing.

But For example Titanium Carbide which does not use a program, was processed just fine
On 0.2.19 this was working correctly, maybe it's something with the addition of Almost Unified.
Trying to use Greg-only dusts also does not work.

The 1-block Mixer programmed recipes work correctly. The problem seems to be only with the Large Mixing Vessel.

do you by change have distinct buses enabled?

something might've gone wrong again in those

after disabling distinct buses it's processing just fine, thanks! But isn't there a risk then for the wrong recipe being processed? I thought that's what the distinct buses function is for.

yes, please report this issue to https://github.com/GregTechCEu/GregTech-Modern/issues.

GregTechCEu/GregTech-Modern#554 done, closing this one.