While walking next to water on some farmland, the water would make my character's walking distorted and drag me into the pool of water. I have tested this with other blocks and I've only seen this done with wet and dried farmland, and soulsand. Basically blocks that are 1 pixel smaller than other blocks. With some more testing I found that it's not only with water but other block types as well shove me into it (water, lava, air, slabs with or without water, campfires, stairs, saplings, etc.)