Breaking and Placing Blocks in Creative has a delay

When you place or break a block in Creative (haven't tested in Survival), there is a noticeable visual delay. The block is "there", it just doesn't appear for a second.
It seems to only happen with new blocks, and when I try to take a screenshot, it fixes itself.

I have uploaded a video to Twitch showing this bug: http://www.twitch.tv/thegreatfalro/c/4676817