Items in chests and inventory randomly disappear

Hi
The version is 1.12.0 on xbox one there is no option for xbox
I just logged back into my Minecraft world and items have gone missing.
They were previously there 90 minutes ago.
These include a full single chest of cobblestone, a rabbits foot, totem of undying, experience bottle and an other item which I can't remember .
Please see pictures below with co-ordinates and locations of missing chest and items.
Thank you for your help
Lewis