I got Melee Constructs so they are kinda prone to walking around and trying to get in close combat. On open maps I sometimes can see them, due to the angle of the camera, doing nothing while they get attacked. When I check on the minimap their green dots simply stand still.

When I get closer again, they start performing their skills/attacks again.

My Theory is that when I stand still and allow my bots to spread out from me they can get "out of bounds" due to their attempts of getting into melee and their AI may not account for that and simply shut off if it is to far away from the player.