did the same for me, fixed it by clicking respawn then wait till its around 1 or 0, then exit the server, and join another one. Worked for me

Happened to me also. I took something from my vicinity, but it never really appeared in my backpack, but then I tried to take it again or any other object since it was unusable.

Same here! Its frustrating lol I got everything I wanted, then I picked up the only objet I didn't have: a map, i got on a staircase, then....died when I came on the top floor! What just happened! I played like over 50 hours with this character making sure I don't get killed by zombies/PvP and out of nowhere, the game kills me. And I know this is alpha, i'm not dumb, thats why I post this here on a bug report so it gains popularity and get fixed asap. I also experienced fps drops just before. But maybe it has something to do with admins how decide to clear their servers or idk.