Steps to reproduce the issue:
Create a world in the official version of 1.21.80 or the beta version of 1.21.90.23. Using any projectile, you will find that the projectile is not launched from your sight, but from the point you touch.
Expected result:
The projectile should be launched from the direction of your sight.
Actual result:
The direction of the projectile is not emitted from your sight, but from your touch.
This issue is being tracked at MCPE-201558.