Put the summary of the bug you're having here

What I expected to happen was...:
be able to walk in to a double chest from the side and then be able to jump normally whilst walking into the side of it.

What actually happened was...:
I walked into the side of the double chest and whilst looking at it i jumped, it then glitched and shook up and down strangely.

Steps to Reproduce:
1. place a double chest
2. go about 3 blocks (can also work from just beside) to the side of the chest and look at about the middle of the chests.
3. walk into the chest (still looking at same point) and when you walk into the double chest (or slightly after) jump. You should not be able to jump over properly unless you jump from before impact.