How this is happening is basically sometimes, its happened to me and my friend is that when coming through a portal instantly "suffocates you" and your items are gone. I've searched for them and could not find them. I multiplied my nether coordinates by 8 in order to get my overworld coordinates in case it spawned a new portal and nothing was there. my friend is on switch and I'm on an android tablet vers 8.0 so if you could please fix it I would appreciate it