I first notice when I attempted to harvest an automatic wheat farm with water. Usually all of the seeds/wheat flow all the way down into another stream of water that collects them all on one block. However every one of them was stopping just before flowing off on the cobblestone.

So I investigated further and what seems to be happening is the objects are getting "stuck" or "snagged" on the cobblestone because it is slightly taller than the plowed-dirt blocks. The height of the flowing water does not matter. I was able to replicate this with block and any block slightly shorter than normal. Hopefully this isn't intentional. I've attached just two images showing this.

Thanks for all the hard work guys! First time submitting a bug.