EP-13 Collimated Sight Bug

Hey guys, sorry if this has been posted before, but I noticed that when I turn on the collimated sight for the RB-75 and move my head position really low in the cockpit I can see the TV screen background for the collimated sight behind the radar screen (and a little gap below the backup artificial horizon). Found this out when my Track-IR went crazy and my head position ended up there. Not sure if this is known, a new issue or only my issue :huh: It does go away once I turn off the sight.