Disappearing items

I was playing Halo last night and unlocked a few new symbols (tags) and a new set of armor. When I started playing today, after I gained a level, I went to view my armory items, and my assault rifle skin, a set of amour and a few symbols (tags) were no longer available. My current symbol was no longer found and had changed.

Then later on, I gained another level, it said I unlocked the items that I already had unlocked and I went to the armoury, and still gone?

Anyone else who has experienced this, if you could explain why its missing, and if it’s just a glitch or bug and will reload at some point, let me know please!

Not sure if this was the right place to post :confused:

Anyone?