Okay, so I was playing on Famcraft and doing a jigsaw puzzle IRL. I got distracted for more than ten minutes and I was afk. When I came back I saw that I had died so I did /back. It said I had no grave to warp to even though I had just died.
I lost enchanted diamond armor and tools, including a Mending elytra, a Silk Touch Fortune III Unbreaking V diamond pickaxe, 18 diamonds, a Sharpness V diamond sword, and an Eff. V Unbreaking V axe.
I have no idea whether this is a glitch or the /back just expires after a while, but for the moment I'm using stone tools and a set of almost-dead iron armor I found in my chest.
Please help, if you can!!
-Tas