apologies if this is duplicated, the previous reply failed.
I noticed my bakery had been swept clean after I changed households, it feels a lot like TS3 clean up as everything is removed, no out of stock signs, no stinky spoilt dishes, just lots of empty shelves! It's never happened before, but as I've only recently started playing a different household I can't say when the bug happened.
edit. I went back to the bakery household and restocked every thing, then opened the business and instructed one staff member to sell and another to restock. Then I swapped households when the lot loaded I saw that my Simself was at the bakery so I chose to go to him at the bakery. It was open and all the fridges were full. I played the game for a while had him buy stuff which was restocked fairly quickly, then sent him home.
Closed the game, did a backup, updated the game today, fired up the game at that same household and thought I'll send him out for some cake. But when he got to the bakery it was completely empty. So I swapped to the bakery household again, had them fill the fridges again, manage the employees again. He sacked the salesman because he wasn't and promoted the restocker because he did, and returned the baker to his home lot before swapping back to my Simself household again.
Again when the lot loaded my Simself was at the bakery, so once more I chose him as the active Sim, and once again the stock was still in the fridges the only difference this time was that there was a random townie staff member cleaning. I stayed and watched until my Simself was exhausted and saw that both staff members sold items although neither of them restocked anything so pretty soon the shelves were full of out of stock signs.
The whole system seems borked, it's so frustrating to watch!
I love the way my Simself can go to the bakery to stock up on treats, but I can't figure out a way of making it consistent. Tomorrow I will have him travel back there and see what's what but I am not holding out much hope.