This happened to me last Fall and it was caused by a grocery delivery bag hiding on the lot where I didn't see it. Have y'all had any grocery deliveries where you thought they didn't show up?
That's what happened to me and then I found the bag hidden behind a shrubbery. Once I found it and unloaded it, everything went back to normal.
I can't remember where I got the tip about delivery bags bugging out putting things in the fridge, possibly Reddit or from an old bug thread on Answers HQ.
One last thing to add: I also tried bulldozing and replacing originally, but that didn't help, because in my case the version of the lot I had saved evidently contained the bugged bag. I even tried putting the lot in a new save, before I figured out what was happening. I haven't had a single problem since with the lot in question.
It's possible that the same problem might happen just having one of the delivery bags from Debug as a decor object on the lot.