First person camera snaps to the side at certain angles while in a boat

Are you sure you are using the control buttons that turn the boat and not the player? The player can turn in different directions while in the boat without turning the boat.
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i am using the controls i use on all the snapshots.  this is the first time when i turn the boat, my view doesn't keep pointing the same way the boat is pointing.  i will do some investigation like going back to the classic resourse.

1: i removed myself from the beta program.

2: i deleted minecraft and reinstalled it.

3: i started a new game and set all the choices for caves and cliffs, etc

4: started new game and got wood and made a boat.

 i got into the boat and my left thumb was able to turn the boat with my view changing as the boat turned and the boat was able to move forward and back ok, onlly with my left thumb on the control.

This issue occurs every time the player looks south while using a boat in first person view.

Widows 10 PC Bedrock version 1.18.10.21 Beta. Windows 10 Pro v 21H1; OS Build: 19043.1348; World Seed: -197586509 Beta; Game Mode: Survival; World Size: Infinite

Steps to Reproduce:
1. Get in a boat, and begin a forward motion with the DS4 controller's left joystick pushed forward. 

Observed Results:
The boat turns and the player's view stays straight at the original view. The view is not where the boat is headed.  It is difficult, nearly impossible, to navigate the boat, see above video captures.
Expected Results:
The view corresponds to the direction of the boat's direction.

This issue was not present in the previous Beta. 

i thought i indicated your result in my original post but i didn't describe it that way.  i guess i am to old to use new language...  (78)

and i don't understand why my title was changed to something that was not my problem?

 1.18.10.22 Beta is available only on Xbox and Android (Google Play) which means the issue is not resolved for Windows 10 Bedrock Beta. Currently, I have seen no projections when the Beta update will be available for Windows 10.

This is not fixed in Windows 10. Should I create another bug report?

No, just wait until the next beta is released.