Environment: Background Mode: Canvas causes Popup windows to become severely transparent (including default "ToolTip") regardless of background_canvas_max_layer property

[SlavaSTiwari]

Tested versions

• Reproducible in Godot 4.3 (Renderer: Mobile)

System information

Windows 11 - Godot Engine v4.3.stable.official.77dcf97d8 - https://godotengine.org Vulkan 1.3.278 - Forward Mobile - Using Device #0: NVIDIA - NVIDIA GeForce RTX 3050 Laptop GPU

Issue description

When using World environment in a scene, and setting the background mode of an environment to canvas, every popup window (transparent = true) to become severely transparent (almost invisible) Even when the theme is custom set to be fully opaque have tried to change the CanvasLayer's Layer which is the parent of the GUI node to a higher value than the background_canvas_max_layer but it has no effect.

EXPECTED OUTCOME (WorldEnvironment Background Mode set to: Clear Color):

If this is the intended behavior, please tell me how to turn the severe transparency off for the default tooltip since i am overriding it with my own using _make_custom_tooltip() (even though the issue still exists with the default ones). thank you.

Steps to reproduce

1. Create a new projectin godot 4.3 (Mobile)

2. Make a 2D scene:
   

3. Add a WorldEnvironment Node as a child.

4. Add a new environment and in the "Background" subgroup in the editor, Change the mode to Canvas and set Canvas Max Layer to 1:
   

5. Add a CanvasLayer as the Child of Root Node2D. Set the Layer to anything greater than 1 (5 in my case):
   

6. Add a PanelContainer as the child of CanvasLayer. Set the TooltipText to any text in the editor:
   

7. Save and Run the Scene and Hover your mouse cursor over the PanelContainer. The (More) Transparent Tooltip Text will be displayed:
   

8. Now Change the Background Mode of the WorldEnvironment to anything other than "Canvas".
   

9. Save and Run the Scene. Now the Popup (Tooltip) is being displayed as Intended:
   

Minimal reproduction project (MRP)

mrp-bg_canvas.zip