Not sure if this has been reported, if so, disregard.
* AI soldiers equipped with nvgoggles.
* Initial time-of-day regular daylight (0700).
* Setup a trigger that allows you to advance the time.
Now advance the time to darkness, AI's don their goggles.
Now advance time to daylight, AI's still wearing nvgoggles and never take them off.
Hope this was helpful to someone.