Sims stuck cleaning/repairing an object dirtied/broken by gnomes

I'm not 100% sure this issue was caused by the gnomes but I noticed it first after the gnomes broke all my stuff. Sims (mine, and NPCs like maids and visitors) will begin cleaning or repairing an item and then just continuously do it, without making progress, for hours. In the case of the maid, she was cleaning the stove and I got the end of shift pop up charging for her work, but she continued cleaning the stove until I reset her. My sim repairing the fridge went the same way. 

When I reset the sims cleaning, the item they were cleaning was clean. Not the case for the broken items, they remained broken. 

Additional context: fridge and oven are from snowy escape, sink that was also affected is from parenthood, the gnomes didn't come from my household having an ailment, I think it must have been someone walking through the neighbourhood, but I didn't see anyone red and spotty. 

Game is up to date, all packs owned except some kits, no mods or CC used in months, issue is new, but recurred after leaving the game and restarting. Playing on PC.