Seasonal Achievement not posting

[Meteorblade-2266]

From the stickied Things That Are NOT Bugs thread…

@Dragonmaster-1816

2. Achievement/Conquest Window Doesn’t Checkmark Boxes (I.E. GR55 with 6 sets)
   The Achievement/Conquest Window is slow to update and at times will not reflect say a GR clear with the required set. It will update sometime but it is still considered complete and if you meet the requirements for the achievement/conquest, it will still finish even if the check boxes are not updated.