I finally had the time to check. He really is a strange case. If you go up or down next to him, he doesn’t appear on the mini map. If you mark him as a target, he’s slightly elevated but as soon as you bump into him he’s on the same level. Drove me crazy. That’s why I just made a short little easy contract out of it (on Epic) 
Get down off your high horse
Epic ID: 1-12-4973845-62
(I know this isn’t the right thread for contracts. But this one is so boring it would be a shame to put it in the other thread…)