Possible to lose gear from not letting the sync finish?

This happened in the pre-sequel. I didn’t let the “data sync” thing finish yesterday, and today I realized the legendaries I earned yesterday are missing. I was pretty disappointed to see that my thingy, omni cannon, thunderfire, and longest yard were not in my inventory, where I left them. I don’t mind it anymore, I was just going to use them on the grinder. It also said something after I canceled the sync, something about losing data, I think. Could that be the reason for the missing legendaries??