The texture of the water seems to be blaze powder. Behavior of the water has not changed. This may have been caused by the update of how blocks are rendered.
I made a short 1 minute video that fully shows the situation: https://www.youtube.com/watch?v=UDSWgf9zkEA
Thank you for taking your time in reading this.
i have a similar problem except that only source blocks are changed and they are saplings also on unrelated note leaf blocks aren't see through