Yea I noticed. It looks like I was lagging but but no, the players were moving weirdly.
I never noticed it directly. Gotta play on a server and then notice.
EDIT: I was using a texture pack, it is not a vanilla glitch. I just figured it out.
For me this happens when you have too many packs or worlds.to fix it, sadly you have delete all your packs and worlds. To do it, go to a file manager and click on games and then delete the com.mojang folder. It will delete all your current worlds and packs but it will not do any other things to minecraft and will not delete your xbox live or servers.
Do this only if you want because it will delete all worlds and packs.
Before it took 10 minutes and after doing it, it takes 5 seconds
This does also help to boost your fps and makes the game quicker
It makes sense for me, and also it was meant to happen