Below is a custom resource pack with a custom water colormap. Above the line is Optifabric, where the colors don't change. Below the line is regular a Optifine installation, where the colors change as they should. Underwater, fog, and sky colormaps continue to work. Tested on Optifine 1.19 pre8

Same with lava colormaps too! Noticed the problem when updating to 1.18.2

Seems to have been an issue ever since 1.18.2 as other people have said, water colormaps just do not seem to work atm.

hoping this can be fixed at some point??