Godot: CenterContainer children do not scale to parent

[CowKeyMan]

Godot version: 3.2

OS/device including version: Windows 10

Issue description: I have a CenterContainer and a TextureRect as a child to it. When I put both 'Fill' and 'Expand' to the CenterContainer, and mark the child to 'Expand' with 'Keep Aspect', the child ends up becoming a point on the screen. The reason I want this is because the image is actually too big for the screen. The way I fixed this (dirtily) was to replace the CenterContainer with a MarginContainer and set the TextureRect to 'Keep Aspect Centered'. I have attached images below as well as the project, with 2 scenes, one with the bug, called 'MainMenu-Bugged' and the other with the dirty fix. For more context, I was following this, but with a different aspect ratio: https://docs.godotengine.org/en/3.2/getting_started/step_by_step/ui_main_menu.html.

Disclaimer: I am still a beginner at Godot, hence it might be the case that I'm misunderstanding something.

The way I want it:

What happens when I used center container instead:

The project:
ui_main_menu_design.zip

[mrcdk]

You need to set a rect_min_size in the TextureRect if not it won't know how much space it should take

[groud]

This is the expected behavior.
You can either untick the "extend" checkbox in the inspector, which will compute a minimum size out of the texture, making it 1:1 texture, or you can keep it this way and set a custom minimum size.