Inventory cleared when leaving Nether

when i leave the nether with a lot of lag on a realm i hear the sound of me taking damage over and over again and it is stuck in a infinite loading screen and it crashes i try to rejoin and i says i cant use that skin and it sets it to alex this happened to me twice and my frend once when using custom skins and non custom skins
Update all the items were sent to 78 64 156 witch is in the cords of the neather portal in the neather