Yesterday I was playing Minecraft for around 2-3 hours and I decided to call it a day and then save and quit the world, earlier this afternoon I decided to get back on Minecraft and after I loaded into my world I ended up back at world spawn, at first I thought it might be because I didn't place my bed and saved my respawn point. But at the same time I thought it could've been a random bug. So I ended up deleting two of my other worlds that had the same issue. I also opened the chat but it did not say that I died to any mob.