I am using Window 10. Java Version 8, update 181.
Put the summary of the bug you're having here
What I expected to happen was...:
Nether mobs to spawn.
What actually happened was...:
No Nether mobs spawn except for Blaze.
Steps to Reproduce:
1. I turn on easy difficulty
2. Go into the nether
3. And nothing is spawning. No pigmen, Ghasts, wither skeletons, magma cubes. Only Blaze at their cage