I'm having the same issue in a nether only survival world. The first time i died to angry zombie pigmen they forgave after i respawned, 2nd time after though and they just stick to being hostile after death. only once i wipe them out (usually by setting the difficulty to peaceful for a second cause i'm tired of this bug) will they actually not be hostile. i've tried changing the gamerule to false and then back to true, but that didn't do anything. for reference, its an offline world, cheats are on, (so i could get to the nether at the start), and everything else about the world is unchanged. it was created a few days ago and has been optimized in the edit menu, but i dont think that matters.
Joe Thomas Piccolo
I'm having the same issue in a nether only survival world. The first time i died to angry zombie pigmen they forgave after i respawned, 2nd time after though and they just stick to being hostile after death. only once i wipe them out (usually by setting the difficulty to peaceful for a second cause i'm tired of this bug) will they actually not be hostile. i've tried changing the gamerule to false and then back to true, but that didn't do anything. for reference, its an offline world, cheats are on, (so i could get to the nether at the start), and everything else about the world is unchanged. it was created a few days ago and has been optimized in the edit menu, but i dont think that matters.