Hello there, /r/prisonarchitect!

I've been having some issues with my cleaning cupboards and have not yet found a solution. I have 3 cleaning cupboards in my prison, with 20 prisoners assigned to each as prison labour. I had no issues with this until just now, when I left the game running for two hours to go watch a movie. When I came back, the prison was filthy and now when my prisoners go to work in the cleaning cupboards, they just stand there for the entire time and do nothing. I'm not sure how to fix this. I tried reassigning everyone to the cupboards but that resulted in the same issue.

Any thoughts on how I can resolve this? Did not find anything online other than that this has happened to people in the past but no real advise on how to fix it.

Thanks!