Bounce property of RigidBody2D physics material is ignored after saving scene

[theolen]

Godot version:

3.2.3 stable official

OS/device including version:

Macbook Air M1 base model, MacOS 11.1 Big Sur

Issue description:

Following steps in tutorial https://docs.godotengine.org/en/stable/getting_started/step_by_step/instancing.html
Setting 'Bounce' property of the ball's Physics Material to 1 failed to increase bounciness.

You can also reproduce it by creating a new RigidBody2d and observing how it respects the Bounce property in the editor until it is 'saved as a scene', then the setting in the editor is ignored, and seemingly overridden by the saved file.

Steps to reproduce:
Open Minimal reproduction project
Play project and observe bounciness of ball
Set Ball>Physics Material>Bounce to 1
Play project and observe bounciness of ball has not changed

Minimal reproduction project:

Instancing.zip

[pouleyKetchoupp]

@theolen Could you please add a minimal project at the step you're at in the tutorial? It would make testing much easier for contributors.

[theolen]

@theolen Could you please add a minimal project at the step you're at in the tutorial? It would make testing much easier for contributors.

Ok, here you go. Should be very quick to test now.

[pouleyKetchoupp]

Reproduced in 3.2.4 beta 6.

It looks like a general limitation with resources from inherited scenes. Changing the bounce property in the parent scene works properly, but when changing the value in the instantiated scene, it gets discarded when saved.