Not sure if anyone else reported this, it seems to be a derivate issue from the classic ender pearl clipping (already fixed).
In this case, players can clip through solid blocks with the use of enderpearls if the blocks form a corner.
Here's a video on the issue which should be self explaining:
https://www.youtube.com/watch?v=5G2pCZB0PxA
Thank you for your report!
However, this issue has been closed as a Duplicate of MC-2164.
It has been linked to this report. If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
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