RigidBody2D cannot rotate after CollisionShape2D is disabled

[lukepass]

Godot version:
3.2.2.stable.official

OS/device including version:
Kubuntu 18.04

Issue description:
As described in this issue:

#30551

After a RigidBody2D disables its CollisionShape2D, it cannot be rotated until the shape is re-enabled.

Steps to reproduce:
This is my player:

This is the change_state method of my player (you can see that INIT and INVULNERABLE disable collision):

func change_state(new_state):
	match new_state:
		INIT:
			$CollisionShape2D.set_deferred("disabled", true)
			$Sprite.modulate.a = 0.5
		ALIVE:
			$CollisionShape2D.set_deferred("disabled", false)
			$Sprite.modulate.a = 1.0
		INVULNERABLE:
			$CollisionShape2D.set_deferred("disabled", true)
			$Sprite.modulate.a = 0.5
			$InvulnerabilityTimer.start()
		DEAD:
			$CollisionShape2D.set_deferred("disabled", true)
			$Sprite.hide()
			linear_velocity = Vector2()
			angular_velocity = 0
			emit_signal("dead")
	state = new_state

And this is the method used to rotate the player:

func _integrate_forces(physics_state):
	set_applied_force(thrust.rotated(rotation))
	set_applied_torque(spin_power * rotation_dir) # this line is not working when shape is disabled
	var state_transform = physics_state.get_transform()
	if state == INIT:
		state_transform = Transform2D(0, screensize/2)
	if state_transform.origin.x > screensize.x + radius:
		state_transform.origin.x = 0 - radius
	if state_transform.origin.y > screensize.y + radius:
		state_transform.origin.y = 0 - radius
	if state_transform.origin.x < 0 - radius:
		state_transform.origin.x = screensize.x + radius
	if state_transform.origin.y < 0 - radius:
		state_transform.origin.y = screensize.y + radius
	physics_state.set_transform(state_transform)

When the player is in the INVULNERABLE state it doesn't rotate. Please note that spin_power * rotation_dir is correctly set to a correct value even in that state.

Minimal reproduction project:

https://bitbucket.org/lukepass/space-rocks/src/master/

Here is the zip: https://bitbucket.org/lukepass/space-rocks/get/7fad1b35ac35.zip

Please the the invulnerability timer to 10 seconds in the Player scene then run the game. Hit a rock and try to turn.

Thanks!

[Rubonnek]

I'm able to reproduce this issue with 23b553b

[Rubonnek]

I also got some errors on the console after running your code, but it's a matter of deferring spawn_rock on _on_Rock_exploded:

call_deferred("spawn_rock", size - 1, new_position, new_velocity)

[lukepass]

Thanks for the additional correction! As a side topic, do you know where can I find more info about why sometimes is necessary to use call_deferrend when calling methods in process?