Collision detected only when moving

[golddotasksquestions]

Godot version: 3.1.2 stable

OS/device including version: Win7

Issue description:
Collision is only detected when either colliding object is moving.

Steps to reproduce:
Animate the CollisionShape of an Area2D and try to detect it in another not moving object.

Minimal reproduction project:
Collision_only_when_moving.zip

[golddotasksquestions]

Can confirm same bug in 3.0.6 as well.
Minimal 3.0.6 project:
3.0.6_Collision_only_when_moving.zip

[golddotasksquestions]

Can confirm the same effect without the AnimationPlayer, just using code:

[golddotasksquestions]

Tested with RigidBodies2D in 3.1.2 stable, exactly the same result. Collision are not detected when shape properties are changed in code or via animation, but are detected when RigidBody2D is moving.

Same results throughout in 3.2 as well.

This really is a problem for users of the CollisionPolygon2D as with the CollisionPoligon2D the main advantage is in animating the Polygon vertices. Just moving or scaling the Area2D is not a substitute.

[iamiota]

Add position = position in the last line of func _physics_process.

[golddotasksquestions]

This works @iamiota but makes absolutely no sense to me whatsoever.