Progress in Spartan Ops not recording.

Hello, I just finished Episode 1: Sniper Alley and the game didn’t update to say I’d finished the mission on Legendary. Also, all of the missions since the last update have been wiped to not display that I’d finished them all on Easy in the past.

Check the progress towards the achievement in the appropriate section. Mine does the same thing yet the counter is still increasing in the achievement progress.