Hey I've been having this issue in 1.13.2. For some reason, even if I disable all the performance improvements in optifine, and also go into the shader options and enable the fancier water, my water still looks like vanilla water. No waves, no fancy texture, and to be honest, it's a real eye sore. (using the extreme shader v1.20)
The Image: https://imgur.com/LIYlfD3
Is there any fix for this? Because no matter what I think of, the results are always the same.