im playing tnp limitless 3 and i have set up a tier 5 woot farm successfully, it was running every controller i placed on it just fine until i added the wither controller, it now says it needs required ingredients but wont take them in from adjacent blocks, i have a hopper trying to push in, a storage drawer and a chest all 3 have skulls and soul sand in them and it wont take any of them it just hits 100% and skips not only producing the wither drops but all other mob drops its supposed to be generating as well.

the wither controller is on back and appears as the 4th 1 on the list, wither skeleton is on front as primary endermen on the right and creeper on the left

I've created the same setup as your on the same modpack and I have both vanilla chests and storage drawers working on the importer. - this is with the same perk/controller combination that you have.

You don't have any mass perks so it should only be looking for "3xwither skull", "4xsoul sand".
I'll ask an obvious question - it is "soul sand" that you have and not "soul soil"? (I know it wont be but I nearly used the wrong one so I thought I would check).

im ashamed to admit but ya i was using soil, this is the first pack i have played past 1.12 and im still not used to all the new blocks and textures, sorry for wasting your time

I'm just glad it was something simple.
The whole soul soil is new to me and they should have maybe made it a little bit more unique in terms of texture.

When ingredients fail then no mobs drops are generated for any mob in the factory - it is an all or nothing.
Could you post an image of your factory and I'll create the same thing here to test against.