I was on Makeb last night and saw several people having this problem. I haven't gotten to that step in the quest chain yet so it makes me concerned. Looks like it was a problem a few years ago, but got patched(?) Now its back... did they use a regressive build for 5.0? Hopefully a quick fix.

This move makes absolutely no sense to me. I didn't even progress very far in the DvL achievements, and I can only imagine the ire of those who went through the Legendary or Eternal levels! Archive them into a '2016 DvL' legacy branch or something similar... just zeroing them out is absurd, especially given the hundreds of hours some folks pumped into getting these achievements!