Challenges Aren’t completing

This has happened before but this time it’s the most infuriating.

there is a seasonal challenge for getting 150 medals with vehicles (splatter, wheelman, etc.), and despite completing the challenge and THE GAME TELLING ME IT HAS BEEN COMPLETED, it does not unlock any progress on it whatsoever.

This is the very last seasonal challenge I have to complete and it is driving me crazy that the game will not work.

PLEASE get this fixed.

Make sure and file a bug report about this on the Halo Support site: