Defense Mission Last Enemy Glitch

[SpicyOhio]

So I was doing a few palus runs on the pluto infested defense missions tonight. We were running fine on our last round until we made it to round 15. We killed every enemy fairly easily but the mission didnt end so we figured an enemy was stuck somewhere. We spent the next 30-46 minutes searching the map multiple times and couldnt find anything, the indicator that usually shows the last enemy just led in an endless circle that looped back to the cryo pod. Eventually out of frustration 2 members of our party left so we had host migration. Me and the other remaining guy cleared the wave again and found ourselfs in the same situation only this time the stalker came after me and dropped a dread blueprint when we killed it. We eventually had to abandon the mission thus losing the blueprint ._.