Changing character movement speed causes camera rotation to speedup

[Avik Biswas]

I have a Blueprint character that inherits from c++. Nothing fancy in the c++ side just a base class

In the character bp i have a Python actor component attached .
Here is the python module

import unreal_engine as ue


class Player:
    
    def begin_play(self):
        # get a reference to the owing pawn (a character)
        self.owner = self.uobject.get_owner()

        # the following two values were originally implemented as blueprint variable
        self.base_turn_rate = 70.0
        self.base_look_up_rate = 70.0 
        self.owner.bind_axis('Turn', self.turn)
        self.owner.bind_axis('LookUp', self.look_up)

        self.owner.bind_axis('MoveForward', self.move_forward)
        self.owner.bind_axis('MoveRight', self.move_right)

        # bind jump actions
        self.owner.bind_action('Jump', ue.IE_PRESSED, self.owner.jump)
        self.owner.bind_action('Jump', ue.IE_RELEASED, self.owner.stop_jumping)

        # bind sprint actions
        self.owner.bind_action('Sprint', ue.IE_PRESSED, self.sprint_pressed)
        self.owner.bind_action('Sprint', ue.IE_RELEASED, self.sprint_released)     

    def tick(self, delta_time):
        pass

    def turn(self, axis_value):
        turn_rate = axis_value * self.base_turn_rate * self.owner.get_world_delta_seconds()
        self.owner.add_controller_yaw_input(turn_rate)

    def look_up(self, axis_value):
        look_up_rate = axis_value * self.base_look_up_rate * self.owner.get_world_delta_seconds()
        self.owner.add_controller_pitch_input(look_up_rate)

    def move_forward(self, axis_value):
        rot = self.owner.get_control_rotation()
        fwd = ue.get_forward_vector(0, 0, rot[2])
        self.owner.add_movement_input(fwd, axis_value)

    def move_right(self, axis_value):
        rot = self.owner.get_control_rotation()
        right = ue.get_right_vector(0, 0, rot[2])
        self.owner.add_movement_input(right, axis_value)

    def sprint_pressed(self):
        self.owner.CharacterMovement.MaxWalkSpeed = 2000.0

    def sprint_released(self):
        self.owner.CharacterMovement.MaxWalkSpeed = 600.0

I have shift key assigned as Sprint binding
and when i press shift character movement increases and returns to normal when not pressed.
It works fine in the packaged build but in standalone or PIE when i press shift the camera rotation seems to get faster each time i press shift.

I am on WIndows 10 1909
UE 4.23.1