When flying over the height at/over the height of clouds, water just completely disappears visually; it appears back when going under cloud height again. My settings for VV can be seen in the screenshot.
MCPE-221065
Vibrant Visuals: Water disappears at cloud height and up
Resolved
Duplicate
0
This issue is being tracked at MCPE-203239. It will be fixed in 1.21.90.