Blurred embedded subwindows, when content_scale_factor is set on parent Window

[Kay-Eth]

Godot version

v4.0.beta12.official [3c9bf4b]

System information

Windows 11, Mobile (Vulkan), NVIDIA RTX 2070 SUPER

Issue description

When content_scale_factor is set to 1 on root Viewport, then everything renders correctly:

But when I set it to, for example, 2, then the popup is blurry (exept for the Popup's title label):

Additionaly, when I set content_scale_factor to 0.5, this happens:

Steps to reproduce

Create a scene with Control and add any popup as a child. Add script to the root node and in _ready function write:

get_tree().root.content_scale_factor = 2	
$<PopupDialogNode>.popup_centered()

Hit play and enjoy

Minimal reproduction project

ContentScaleReproduction.zip

[Kay-Eth]

Still a thing with 4.0 RC1

[Calinou]

Related to #54030.