Would it be possible to have the spawn point when going to nether be next to the portal instead of in the portal? The tiniest bit of lag sends you right back where you came from... I know many other people are having this issue... Even without lag, if you dont move instantly right when you load,you get sent right back to where you came from... Just a thought..
That's a vanilla mechanic. We would need to change the complete teleporting and nether portal creation.