Summary:
Particles do not use the same billboarding method as Java Edition. This is controlled by the particle json files as included in the bedrock samples. Effect is most noticeable when looking straight up or down.

Steps to reproduce:

1. Observe particles uncentered in the player's view.

Observed results:
Particles rotate towards the player, causing visual warping when uncentered / odd spiral rotations.

Expected results:
Particles face the camera in a uniform manner.

Fix:
Replace every instance of

"facing_camera_mode": "lookat_xyz"

in resource_pack\particles with

"facing_camera_mode": "rotate_xyz"

Notes:
Particles_1.gif = Observed results. Default resource pack behavior.
Particles_2.gif = Expected results. Vanilla Java edition.
Particles_3.gif = Fix. Customized resource pack behavior.