Conquest: Sector 2 Siphoning Strike not working correctly

First time actually coming on these forums, and it was specifically to look up this issue. So definitely tag me with the 'me too' option. Actually had not noticed until I was on what I thought was my final set of health steal ups with karga.

When the challenge didn't pop, I went to go look at it and was surprised to see that I was still at 2 out of 20 which I'm assuming were palpatine earlier. Then I ran it again and used his ability to put an ewoj in the ground and gave all my hunters health steal up just to be sure, but still no forward progress. So agreed, 100% repro.