So, this only happens if you're not the host:
Changing back to Warframe While using the Operator or Drifter will kick you out of mission while making you invisible and when mision is completed you get no rewards/will get you stuck facing a single position and can't do anything and you need to die to undo that, this has been a thing as far as i can remember, and needs correction as fast as possible.
Btw Yareli top tier frame