Since updating to 1.14 my world spawns absolutely no hostile mobs anymore in the overworld. The difficulty was hard, but other difficulties are also not working. I havent tested the Nether but the End does spawn endermen just fine. Mob Spawners also work, just the normal mob spawning is broken. When checking the entities in F3 Screen it never goes over 30. Something is clearly wrong! The doMobSpawningRule is also definitely set to true. I dont know what to do anymore as my world and all hours spent in it becomes useless without mob spawning...

I would like to include the world as a zip archive but it is 34mb too big for upload. Can I help otherwise for confirmation or reproducability of the issue?