The bug

I tryed to recreate MC-174502 and found another major bug. If you create a superflat world with the following conditions:

minecraft:bedrock,2*minecraft:dirt,minecraft:soul_sand;minecraft:plains;village

and place water in a line and then try to walk across the water in order to get full speed, the Minecraft (integrated) server will freeze. (Slimes will stop mid-air, you can't interact with anything and most importantly: You can't save & quit nor close your Minecraft window.)

This happens with soul soil as well, see MC-174516.

Video

Bug.mp4