Mob spawning above normal amounts on land and in caves. Lowering difficulty had no visible effect.

On a pure vanilla new server created for the 1.14 update, mobs on land and in caves are spawning well over the normal limit that we are used to seeing, and changing from normal difficulty to easy has not seemed to had an effect on the spawning amount.

Aquatic mob and animal spawning seems to be normal.

What I expected to happen was...:
Normal spawn rates, and lessened spawn rates when difficulty set to easy.

What actually happened was...:
Mobs spawning by the hundreds on land and 10s of each at a time in caves.

Steps to Reproduce:
1. Enter a cave or wait until night time