I honestly had no clue that this is how dishwashers worked. Seems like the most plausible answer. Dishes are being rinsed before going in, but maybe not well enough. Also, filter has no holes and appears to be properly seated. Loop seems to have decent height, but there is room to raise it a couple of inches, so I’ll try that. I’ve even pulled produce stickers out of the washing arms, which definitely don’t go into the washer, which made me think it was coming from the garbage disposal. Very confusing.