Too many mobs are generated in my worlds (squids, cows, zombies, all of them)  All are generated in their biomes but in large quantities. In 1.13.2 this did not happen, but as of 1.14, 1.14.1 and 1.14.2 pre-release this is still happening. Not only in worlds that were migrated from version, also with those created in that same version.

 I tried to uninstal minecraft and i did it, but i did´nt work