Rivens resetting when leaving open world

[(XBOX)TqM FLOUNDER]

When leaving an open world (Plains or Orb Vallis) any rivens that needed to be completed in that area reset. I've had multiple "Kill 'x' enemies on drop ships" or "Kill 'x' tusk ballistas with headshots" reset upon leaving the open world through the door/elevator. 

[(XBOX)R3d P01nt]

12 hours ago, (XB1)TqM FLOUNDER said:

When leaving an open world (Plains or Orb Vallis) any rivens that needed to be completed in that area reset. I've had multiple "Kill 'x' enemies on drop ships" or "Kill 'x' tusk ballistas with headshots" reset upon leaving the open world through the door/elevator. 

Others have reported this as well.  In one of those threads I recall someone noting that their rivens unlocked if instead of leaving through the gate/elevator they returned to their orbiter.  Have you tried that?  (It should work going through the gate/elevator as well, but this could serve as a work-around.)