Dear DE.. Help me understand what happen here. Broken defense Mission or Some other player abusing the reporting system?

[Thawfoot]

So I did the 20 round Nightwave challenge...But didn't receive rewards for the first 10 rounds.

Was i reported as AFK by one of the other players?..

As you  can see from the mission final screen i wasn't rewarded for the end of round 5 or 10

But from the mission summary i was anything but inactive

I stood on top of the mission objective and killed things..

So help me understand what happen here?.. If i was indeed reported for afk .. then that's harassment by the reporting player

If it was some automated system.. then that's broken and need to get fixed... but in over 7k hours of game play i have never seen this..

So please explain