Silk Touch Ender Chest gives Obsidian too?

When breaking an Ender Chest you are supposed to get 8 Obsidian, but if you used a solo touch tool it is only supposed to give you the Ender Chest back. This can be exploited to get Large amounts of obsidian without using the end or lava.

I feel there are more important bugs to clear out, but wanted to make this aware as it doesn't break the game too much.