Missing gear

Hi all, I was wondering if anyone had experienced the bug where you change from one gear set to another ( in my case it was from drg ilvl 104 to pld ilvl 100) and an error comes up saying "insufficient space in inventory" and when you discard a lower level gear from a full set such as head gear, when trying to change sets again, it removed most of my gear - mostly ilevel 100 +. The gear is gone, it's not anywhere! Is this a known fault?

I'd be pretty annoyed if it's gone completely after the time and effort gaining myth and soldiery