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Endermen in daylight do not freeze when looked at, do not stay angry

Spawn chunks are loaded all the time even in singleplayer

Wither In Peaceful spawns very glitchy

Wither boss bug when peaceful

"Persistent" Mobs Still Despawn on Peaceful Switch, Take Loot With Them

Deep water = Mobs forget AI

Zombies spawn in peaceful

Health regenerates slower on peaceful when riding an entity

Minecraft Out Of Memory

Ocelots Spawn on Peaceful in Ridiculous Amounts

TNT is less powerful on easy, Normal, and hard modes than peaceful.

Hunger saturation depletes on peaceful difficulty

peaceful

Unrealistic peaceful mob spawning

/difficulty does not change difficulty when used in singleplayer

Changing difficulty from peaceful may cause inaccurate hunger bars on multiplayer servers

Food Metre Updating Only Visually

Shulker no longer continue close or open when it hurt in the peaceful mode

Some entities don't disappear or still hurt players in peaceful mode

Neutral Mobs Can Damage Player in Peaceful Difficulty

Parrots don't imitate peaceful mobs.

Peaceful mode doesn't work

Ocelots spawn with peaceful as difficulty after reopening the world

Zombies in peaceful mode

Parrots imitating hostile mobs in peaceful is not that peaceful

Some mobs still deal damage to other mobs on peaceful mode

Wolves chasing after non-existent skeletons when summoned in peaceful difficulty