Same here, just updated forge as the only thing, and no liquids anymore.
But ill try another optifine (if there even is a newer version)..
EDIT : Update! Tryed 2 different Optifine versions same issue both multiplayer and singleplayer.
However, when i run the old forge version i was using ( 3.1.2 ) all liquids are there and fine in singleplayer
but in both
3.3.7.135 and 3.3.8.152 all liquids are invisible.