Hostile mobs stop spawning after update to 1.14

I created this world in 1.13.2. All it's was working very well before update to 1.14. First aquatic mobs stop spawning and then all hostile mobs. Consequently, all my farms are broken now

I tried changing gamerule doMobSpawning, render distance, reinstall the game, java, travel more than 3000 blocks. Nothing works for me