Units stuck in production

Is anyone else running into this issue? For the past couple days I have a problem with Thors getting produced in the queue but never popping out. They just stay stuck with the progress bar at full and preventing production of other units. It’s incredibly frustrating! Any tips on how to fix?

It happens when there is no place for thor to move out the factory.Leave enough rooms vetw3n your buildings and it wont happen again.