Not sure exactly what is happening, everything worked as intended for awhile. I Lost all my backpacks due to a corpse glitch. Before that I was using like 12 bags inside of 1 main bag. Every incepted bag had auto pickup set to match contents and it worked perfectly. I lost all my bags and pulled them back through creative. all same set ups. Now the filter isn't working and everything goes into the first bag instead of the main bag inventory. I'm not sure if having the backpack setting set to PLayer is the issue, but it wont let me switch that anyway. I'm currently using sophisticatedbackpacks-1.19.2-3.20.2.1035 in Cisco's Fantasy RPG Ultimate modpack V5d for MC 1.19.2. everything is current within the modpack and nothing has really changed.

my recording is to big to send on here

Have you got pickup in the main backpack?

based on that screenshot you have magnet picking up stuff so now it depends on how you have inception upgrade setup (put stuff in main backpack or incepted first) and whether you have anything else that would filter what can go in what incepted backpack and that can't be done with pickup there but would need to be a filter upgrade or memorized slots.
Also magnet is likely picking up xp from world and putting it in that backpack with tank, pump itself can't take player's xp directly that's only doable with xp pump

I took off the magnet and it's still happening, i have a video but id have to send it on discord.

Main Bag worn in curios slot. Has Adv Pick up with filters to block certain items. Has inception which is set to Inventory First. Contains 12 other backpacks.

Each incepted backpack also has Adv Pickup with filter set to match contents.

I might be wrong, but shouldn't the loot not enter a backpack with Adv Pickup set to match container conyent? With inception set to inner bags first it should run against their filter first, then the main bag right? This is seemingly how it worked the other day.

no that's not how it works, in your case that would mean main backpacks pickup runs first and can put stuff into any of the incepted ones, then if that can't pickup items (because of filter) the incepted backpack pickup upgrades run next and try to pickup into their backpack.

it seems like you are misunderstanding what i'm typing. The incepted bags inventories are set to run first. Meaning their pickups should have first grab as long as the filter doesn't block the item. Then the main backpacks Adv Pick up runs. Bottom line, either way without regards to anything else....the incepted bags filters are not working. They are set to Match Backpack Contents , this filter is the main thing that isn't working for me. every item enters the backpack regardless to that being set.

There's nothing like a setting that makes incepted upgrades run first, the only setting is whether the upgrades in the main backpack should work with inventories of incepted backpacks first which is what I am guessing you have this set to and that's why items appear in those backpacks. You would have to use filter upgrades (not pickup upgrades) in those backpacks to prevent main backpack from putting items in tehm that do not match their inventory. Anyway this is working as expected so I am closing and feel free to jump on our discord server if you need help setting up those upgrades.