Hmm... the codex specifies that XV8 suits may not fire Heavies on the move but states that Stealth Suits have Relentless USR from the BRB. (pg 27 in the box)
Since the Stealth Suits are the ones able to have Marker Lights, you may have something here, Tervigonboy!
Checked the FAQ, nothing about it.
Strange, but not a Stranger.