One can see in between stacked blocks, and this bug has been there ever since 1.5 snapshots begun uploading.
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Please use the search function before posting duplicates...

I didn't know anybody else had the same problem since it hasn't been fixed yet
but since it already has been reported.. Im assuming it's in progress.
Sorry for the inconvenience.

Please do not mark unreleased versions as affected. You do not have access to this yet.