Originally Posted by
Droidhak
Production timers don't run, either, when you're maxed out. Yes, a dude is still at the building, but all production completely stops if there's no place for the finished product to go. Basically, the building goes into sleep mode, as if you'd clicked the Stop button on the building. It's not a bug.
Some sort of indicator that something has been maxed out is generally a good idea, though.