I was recreating DocM77 fish farm in my test world but when it comes to make the top part of the water flow at the end of the flow of water random source blocks of water appear but when I use the sponge block to get rid of the water the random source blocks stay like they were placed via a world edit mod tool and the only way to get rid of them is by plaing a block on that water source or picking it up in a bucket. I'm not sure if this is intended as a feature of the new water mechanics or a bug