Recently I came across an issue with Zombie Pigmen mobs in the Nether.

The story and what happened...
I went to mine up some netherrack, and then as I turned to another direction to mine, I hit one of the Zombie Pigmen, of course, it triggered them to be angry. So I managed to die by it. No biggie, I didn't bother to return. I didn't go into the nether for a minecraft day. When a day passed. I returned into the nether.

What I expected: I expected the pigmen to have calmed down by now, after travelling about over 100 blocks away in the overworld.

What happened: As I returned into the nether, the pigmen were still angry at me.

I had this happen on both servers // realms, and single player mode.

On the realm I was able to have it fixed by asking the admin, snowycheetah750, to switch it to peaceful, he did so, ran it again afterwards and I got into the nether. Then he shut it down again and ran it again back on the Easy mode, and it was fixed.

I would appreciate if you could fix this bug so it doesn't happen again in the future, for the player is not to blame when a pigman walks right into a spot that they accidentally hit them.