No, I guess not. Like I wrote in the original thread it does not matter, whether I leave the NVGs in the ammo boxes (crates) nor in my inventory.
Other items are kept (like weapons). I looted a Titan and it was kept in the ammo boxes. But the NVGs and the rangefinder have been deleted.

According to your AI notes: This behaviour is quite inconsistent. Sometimes the enemy spots you over a distance of 200m+ and sometime you can walk besides them and nothing happens :)