Reaper shown on map but isn’t there

I’m playing generation zero killing my first reaper and I respawn and it’s disappeared, says it’s there on the map but not In person please help! I’m playing on Xbox one

Relogging or restarting your game should fix the issue.

Maybe it’s there, you are just too far (10+ meters) from him.

No kidding, this is happening, as observed in the Forest region…

Where did that happen? (which region, which place)

That place looks like right in front of the barn at Broskulla Farm (Safehouse) in the eastern Farmlands