All my items from my inventory disappeared from my mobile minecraft multiplayer game

So today I was having trouble getting into my Minecraft world because the loading kept stopping at Loading Resources, and when I finally got into the world all my items were gone. I think it might have been something to do with a resource shader pack I put onto the world but this has happened before. 

This was also on a world that I had to copy to use for the update so I have a backup.