Wrong position in SubViewport (Object Picking) for scaled viewport

[MrJustreborn]

Godot version

v4.0.alpha.custom_build [cfcdd57]

System information

Manjaro

Issue description

If the subviewport is scaled, the input picking does not reflect the position on the screen for the object

Steps to reproduce

var factor = 1.0;
func _on_button_pressed():
	if factor < 1.0:
		#get_tree().root.set_content_scale_factor(1.0);
		factor = 1.0
	else:
		#get_tree().root.set_content_scale_factor(2);
		factor = .75;
	
	$SubViewportContainer/SubViewport.size = get_viewport().size * factor;
	
	$Button.text = "Change scaling - cur: " + str(factor)

• to scale the subviewport for a 3D-scene
• on a StaticBody listen for the _on_static_body_3d_input_event
• if the subviewport has a sacling-factor of 1 everything is fine
• if the subviewport has a scaling-factor of 0.75 the mouse-cursor triggers the input_event NOT on the object but with an offset to the top left

Minimal reproduction project

testProject.zip

[Calinou]

Duplicate of #34805 (same cause).