It seems like this might be a thing again? There's one household in my game whose fridge I can't drag food into and at first I thought it was a food ownership issue because the food I was trying to drag had been cooked by a visiting sim, but then today I had the same problem with a meal cooked by my own sim, so I went looking through the forum to see if there was a known bug and found this. I'll need to do some testing to confirm, but it sounds like the same problem, (can't drag food to fridge, can drag the food elsewhere, can use the "put away" interaction to add the food to the fridge) and the thing that's different about this household compared to all the others in the save that I've played recently is that this family moved house recently and brought their old furniture with them!
