Glitch in the game

Thoricbacon6608 fell off the world
And then i lost all my stuff
And all i did was load the game
So I play Minecraft Windows 10 and I came across a glitch where after I have saved the world and I open it again sometimes i just die in the game. It says I fell off the world. That's not possible because I play survival mode with no cheats and I haven't been to the end.
it has happened to me twice now.
I've lost a lot of progress.
It would be nice if this glitch was fixed.