It was possible to make one way doors using soul sand in some of the earlier versions of Minecraft. While I understand that this was reported as a bug and was fixed in one of the recent updates, I've been using this technique for quite some time, and wasn't aware that it was even considered a bug rather than a feature. The specific details of this change are mentioned as follows https://bugs.mojang.com/browse/MC-3337

I'm not sure if this should be filed under bug or improvement.

I understand that this will probably be filed under 'works as intended' but I'd appreciate if the outcome could be reconsidered.