The projectiles don't face the way of travel. This becomes a problem when using a command such as:
execute as @e[type=minecraft:trident] at @s positioned ^ ^ ^5 run setblock ~ ~ ~ minecraft:glowstone    

This should put a block in the way of travel, but it puts it to the side (pictures below)

How to reproduce:

1) press f3 + B to show hitboxes

2) shoot or throw a projectile. It can be an egg, trident, fireball, arrow, snowball...

3) watch the blue line. 

Expectation:

The blue line should be pointing the same way as the projectile's movement, or graphical orientation if the projectile isn't moving.