Any ideas why my sham just broke?

Any ideas why my sham just broke? Seriously. It does not show when I equip it. I’ve been using it awhile now, and it is rather strange. It is in my inventory, but when equipped, it simply isn’t there. I have saved. quit. powered off multiple times. Still no shield when equipped.

XBOX360 OP1 94% veteran player

Did you trade for it? Sometimes people will use illegitimate methods to obtain weapons which could tamper with their effects, which could be the basis of your problem. If not you may just have a glitched shield