Machine Clocking Not Auto Stopped

Hello all, 

I have noticed a clocking issue with regard to Labor and Machine clocking. We have often times where a user is clocked on to a Shop Order. They will forget to clock out of the SO and simply clock out of Time Clock. This will result in their labor being stopped for the SO, but not the machine time. This is leading to very large Shop Order variances, as the machine will remain clocked in for potentially days at a time. 

I have been looking through Site and Work Center settings hoping to find a way to for machine time to stop when labor time is stopped, but I have not found anything. Is there a way to set this? Any help would be greatly appreciated!