First of all, sorry for bad english
As seen in the picture, the HUD claims that there is an enemy hunchback FLOATING IN AIR.
How to reproduce;
-Target enemy mech
-Wait until it pops out of sight
-Face the opposite direction of last sighting of the enemy mech
-Wait until someone marks the said mech again
-Mech Indicator now floats around stuck on your screen until you face the said mech again