Need help with player movement.

Cant understand why my character slowly turns on Y axis with every jump. Can someone help and tell where is mistake? Code is:

extends CharacterBody3D

@onready var character = $"char_body"
@onready var raycast = $"raycast"
@onready var cam_spring = $"cam_spring"

var speed = 5
var jump_velocity = 4.5
var angular_acceleration = 5
var gravity = ProjectSettings.get_setting("physics/3d/default_gravity")

func _physics_process(delta):
	
	# Gravity.
	if not is_on_floor():
		velocity.y -= gravity * delta

	# Handle jump.
	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
		velocity.y = jump_velocity

	# Handle movement.
	var direction = Vector3.ZERO
	direction.x = Input.get_action_strength("move_left") - Input.get_action_strength("move_right")
	direction.z = Input.get_action_strength("move_forward") - Input.get_action_strength("move_backward")
	direction = direction.rotated(Vector3.UP, cam_spring.rotation.y).normalized()
	velocity.x = -direction.x * speed
	velocity.z = -direction.z * speed
	
	if is_on_floor() && velocity.length() > 0.2:
		character.rotation.y = lerp_angle(character.rotation.y, atan2(direction.x, direction.z), delta * angular_acceleration)
	
	move_and_slide()