Ender Portal Bug

Put the summary of the bug you're having here : Every time i travel to the end, i will fall straight down to the void.

What I expected to happen was...:
Describe what you thought should happen here : Might be a bug but I'm i have to look into updating my vga.

What actually happened was...:
Describe what happened here : I would fall straight down to the void every time i go tot the end. if i reinstall minecraft, it seen to help it but will only work for the first travel there. if i want to go back i have to reinstall minecraft once again.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
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