See attached screenshot, compare the animation on the sides with that on the top.
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Not the same bug. That bug is about the animation being centered on the wrong location (which I don't believe is working as intended), this bug is about the animation on the side looking too dark, which is especially noticable when comparing it to other breaking animations, such as the one on the top of chests.

Is this your issue: MC-47726
@Ezekiel: No, it's not. My bug always happens.
I attached a screenshot which should make the issue a bit more clear: Screenshot of a chest (left) and a stone block (right) being broken in 14w34c. Please re-open.
Duplicate of MC-62197