Minecraft wiki entry for Parity_issue_list, associated text: 1.9 combat system.[note 25]
Base attack damage is half a heart, not a full heart.‌[until JE Combat Tests]‌[upcoming: BE 1.18.30]
Camera goes through glass, glass panes and iron bars.[144]
Chat is automatically opened when sleeping.
Clouds are visible from the inside.[145]
Crops can be planted by aiming at the side or bottom of a block.[146]
Dark heart particles when dealing more than 2 damage to an entity.[note 26]
Death messages are more specific.[note 27]
Explosion particles have higher resolution.
Hunger bar depletes slower.[147]‌[upcoming: BE 1.18.30]
Health regenerates faster after eating food and filling saturation.[feedback 42]
Health bar has a white outline when regenerating.
Holding down use when selecting a block will place it whenever it becomes possible.
Mouse sensitivity is more responsive.
Off-hand slot can hold any item.
Particles and nameplates render parallel to the screen.
Pressing F1 or hiding the GUI while wearing a carved pumpkin or looking through a spyglass removes the vignette.[148][149]
Recipes in the recipe book have to be unlocked.
Smarter lighting system, where light only goes through faces that make sense (e.g. a slab on top of a light source blocks it).
Sunrise afterglow is visible during the rain.
Spectator mode.[feedback 43]
Vignette (darker corners of the screen, more clearly visible the darker it is).
Water pushing strength is based on water height: a source block or high flowing water pushes players and mobs faster than shallow flowing water.
When a stronger effect overwrites a weaker effect the weaker effect remains, but is hidden and will come back after the stronger effect expires if the weaker effect had a higher duration.[150]
When world spawn is obstructed, the player's spawn is on the block as close as possible that's not obstructed.