Why won't my TIE fighter diorama figure unlock

[Dragonfang20]

im hoping that u can help me. im playing Star Wars Battlefront on the xbox one and my problem is that no matter how many tie fighters i destroy my tie fighter figure in my diorama will not unlock. i dont want to have to start over, because im almost finished with the game. but i dont know what else to do.
My gamer tag on the xbox one is Dragon Reaper20 if that helps.
I have more than the required number of kills for the diorama to unlock so I'm at a loss as to what to do now