Hey Guardians!
There has been a veritable onslaught of missing gear posts fooding the forums since the onset of 1.1.1 and the mobile vault feature. If you have had items go missing on you, be sure to post the specifics of your situation on the official Bungie thread [url=https://www.bungie.net/en/Forum/Post/106600404/0/0]here[/url]. Bungie is aware of the issue and is looking into the cause, so be sure to post about it! Keep in mind the policy on [url=https://www.bungie.net/en/Help/Article/12211]missing gear[/url].
Hope this helps,
Good luck out there, Guardians!