Water and Lava Behavior (Not making Stone)

For some strange reason in the new 18w11a snapshot I went ahead and tested some redstone designs of making a stone generator using the new water physics and water-log
mechanic and, weirdly enough, the lava under the flowing water branching off the main water source isn't being converted in stone from a video I looked up from ilmango.
And with further testing I went ahead and placed water under the lava in a 3x3x2 square shape and, yet, the water source block isn't being converted to stone or contrarily turning the lava in obsidian this seems to be quite a huge problem if this hasn't been observed but, guess what, I was around this time to report this bug at least.