Lost progress towards Old Master Challenge 1089 Eliminations gone, reset back 0

So glad this is already being talked about on here. I'm in the same boat. Had over 4,000 elims with maul and now they're all gone. So frustrating as the only reason I got back to playing the game was for the dang Maul skin, but this is just a gut punch to my enthusiasm for the game and hopefully it can be fixed.