We, as a community, have dazzled over this texture for years. I believe it is a just cause to say that this is a bug in Mojang, that the block was never added to the game. I believe that "Bleeding Obsidian" should be re-added to the game as a design block. I understand that the idea of a spawn block is no longer an issue, but the issue exists that the idea is still novelty. I say that this block should be added as a simple building block with no effects. It should be added to the creative inventory only (as per the lack of need in survival).
Please do not mark unreleased versions as affected.
You don't have access to them yet.