It is related to water color and quality graphic settings.
Older versions, in low quality the water would appear as an opaque light cyan color. While in high quality it would be a more transparent dark blue.
In this latest, it seems to be switched? The opaque cyan is high quality and the transparent dark blue is in low quality.
Current low quality, looking like old high quality.
Current high quality, looking like old low quality.
I’m honestly not worried if it changed the colors (we can change it in the biome settings), I’m just worried for performance.