Summary:
If a parrot tamed by another player sits on your shoulder, it makes arrows unusable. Arrow either shoots backward or glitches around the player’s head (eventually hitting the player themself in survival).

Steps to Reproduce:

1. Join/create a multiplayer game;
2. Spawn/find a parrot and ask another player to tame it and leave the parrot in stand up position;
3. Walk to the parrot to make it sit on your shoulder;
4. Shoot an arrow with a bow or crossbow (affects both).

Observed Results:
The arrow shoots backward relative to the player or gets stuck behind the player’s head making continuous bouncing noises until the player moves. In survival, it hits the player eventually.

Expected Results:
Arrow shoots forward hitting the desired target.

Notes:
This bug affects only a player with a parrot tamed by another player sitting on their shoulder in the multiplayer/LAN game. This does NOT apply to parrots tamed by the player themselves. But if a player has at least 1 parrot on their shoulder belonging to someone else (no matter on which shoulder or both), they will experience this bug.

*Also affects throwing snowballs and splash potions!

Attachments illustrate how the bug works in survival multiplayer:
Arrow_bug_multiplayer_survival_backwards.mp4
Arrow_bug_multiplayer_survival_2.mp4

And in creative:
Arrow_bug_creative_test_1.mp4
Arrow_bug_creative_test_2.mp4