My stuff fell through the floor

I was checking out some of my loot which was the Transformer and I went to go show my friend and the thing fell through the ground in the sanctuary so I was like all right I’ll check it later in my lost loot after I come back from a mission right and then I went to go do the mission I got two legendaries and one purple that I wanted and then I went to go show my friend again and all of it just fell through the ground plz help. i have video of when it happened it’s on my account on Xbox one captures VeRX Ruben

This happened to both me and my husband when we were playing split screen as well. Haven’t found any way to get our things back

I’ve had this happen, I’ve resorted to the “trade” option. It’s time consuming, but so far, reliable.