Describe the bug
When using a Panel Sprite inside a Custom Object, applying the Tween behavior to interpolate its opacity does not work correctly.
As soon as the opacity is set to 0, the panel no longer behaves normally: the interpolation breaks and the opacity value is no longer respected.
This issue only happens when the Panel Sprite is inside a Custom Object.
The same tween works correctly on a Panel Sprite placed directly in the scene.
Steps to reproduce
- Create a new GDevelop project
- Create a Custom Object
- Inside the Custom Object, add a Panel Sprite
- Add the Tween behavior to the Panel Sprite
- Create an event that interpolates the opacity (for example from 0 to 255)
- Run the scene
- Observe that when opacity reaches 0, the panel stops behaving correctly (opacity interpolation no longer works as expected)
