Mastery Rank 10 Bug

[Swolemancer]

There appears to be a bug with mastery rank 10 mission.

I killed 15/15 on my first attempt, but fell while the screen was whiting-out to go to the success kneel.

It sent me back with Attempts Remaining: 2.

However, the objective was now kill 0 enemies, and so when I completed all of the enemies again, my progress was shown as "Enemies Killed 15/0"

Now, the mission did not complete, and I am just falling indefinitely in a white screen, where occasionally my warframe shows up as falling shortly.

[Swolemancer]

I abandoned the mission and was Rank 10, so it appears the progress was at least given on either the first or second attempt.  Note, while falling indefinitely I was never given a third attempt.