Both of the in progress achievement I had for Battleground Blitz - win 50 - and - participate in 100 matches. Have disappeared from my achievement pane. They have been replaced with already completed City Defender (which is showing at 50/50 for me)
and Wrath of the Alliance - Kill Horde players in cities below.
(while writing this I finished a Battleground Blitz and earned my 25 win achievement out of 50 without it present on my pane.
Not sure what’s up.