I've had a few items randomly disappear from my storage, only the stuff that I was using was noticed, but it's extremely detrimental when your +30 weapons keep disappearing.

further update, it's all items. I just lost like 300+ grinders from this happening

don't have a solution but i can tell you all my consumables in storage disappeared

I'm having the same problem. but it is still saying that the space in storage is taken up. Im fairly new so i havent lost much but it would be nice to be able to use this function.