Glitches out when i spawn in

The world glitches out when I spawn in on single player, realms and servers

What I expected to happen was...:
spawn in and nothing to glitch all over my screen

What actually happened was...:
I spawn in and the blocks are going everywhere

Steps to Reproduce:
1. spawn in and it glitches
2. ... leave and go off mc and come back on then its fixed but if I leave and go onto a different realm or single player world it glitches again
3. ...