The bug

Projectiles hit the player, snowman and witch who threw them at certain angles or close to the entities.

The projectile would hit players, snowman and witch the head, causing unable to successfully emission.

• Notes:

It can only be achieved in the face certain angle.

Approaching entities comparatively easy to reproduce.

This also happens in snowman.

Also affect the ride a entity.

• Projectiles types:

Snowballs

Egg

Ender Pearl

Arrow (It will hurt the players themselves.)

Splash Potions

Lingering Potions

How to reproduce

This can be consistently reproduced by flying into the air in creative and then running these 2 commands (while not moving), and then shooting an egg:

/summon zombie ~ ~ ~-1 {NoAI:1b} /tp @p ~ ~ ~ 102.0 68.5

The exact range of movement varies, but this is one consistent angle.

Examples

Here are a few examples in videos:

Video 1 (Snowballs, egg and ender pearl): https://www.youtube.com/watch?v=q0DzNQxn-p0

Video 2 (Splash potions and lingering potions): https://www.youtube.com/watch?v=hUaRVsjkCIA

Video 3 (This also happens in snowman): https://www.youtube.com/watch?v=5Ug_jCZznUA

Code analysis

Code analysis by [Mod] Marcono1234 can be found in this comment.