Sims stop making drink at bar after paying the money

Every now and again my sim will stop making a drink immediately after the money is deducted when using a bar on my lot in live mode. I lose money and never get the drink. I don't know if this is related with a more general error I have experienced recently where actions in the queue suddenly disappear as my sim goes to do them. I am on PC, base game only installed, no mods and no CC downloaded/installed.