no mobs... on peaceful mode...

on 1.14.2 I used to see monk fishes, dolphins and squids.

now on 1.14.3 I see absolutely nothing on peaceful mode, I tried re-logging

when I turn on easy/normal/hard mode absolutely nothing happens but drowned appears.

I tried re-opening minecraft but now I can't find any mobs...........................

please fix this problem I need the dolphin's...