The change in light when entering a water from a cave is bugged. to reproduce:
1: find a cave/mineshaft/stronghold thats right next to water
2: give yourself night vision
3: enter the water
the screen still darkens for no reason before lighting up.
Comments 2
Is this still an issue in the most recent versions (currently that is 1.13.2, or the latest snapshot 18w48b) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.
Night Vision no longer impacts underwater vision