### Godot version

v4.2.dev.custom_build [c3b0a92c3]

### System information

Debian Linux X11 Xfce

### Issue description

In the following scene tree it is not possible to write anything in `LineEditB`.
![image](https://github.com/godotengine/godot/assets/6299227/ce5f696a-d86a-402f-98f7-6a762f15543e)

I would expect, that it is possible to focus `LineEditB` with a mouse click and write into it.

Regression from #58334

### Steps to reproduce

1. Load and run MRP
2. Mouse Click into the left LineEditB
3. Type Keyboard => No letters appear in the LineEditB

Variant:

1. Load and run MRP
2. Mouse Click into the right LineEditA
3. Mouse Click into the left LineEditB
4. Type Keyboard => Letters appear in LineEditA instead of LineEditB


### Minimal reproduction project

[BugKeyInputRouting.zip](https://github.com/godotengine/godot/files/11994804/BugKeyInputRouting.zip)

ERR_FAIL_COND(p_event.is_null());
	if (Engine::get_singleton()->is_editor_hint()) {
		return;
	}
	if (_is_propagated_in_gui_input(p_event)) {
		return;
	}
	_send_event_to_viewports(p_event);
}
void SubViewportContainer::gui_input(const Ref<InputEvent> &p_event) {
	ERR_FAIL_COND(p_event.is_null());
	if (Engine::get_singleton()->is_editor_hint()) {
		return;
	}
	if (!_is_propagated_in_gui_input(p_event)) {
		return;
	}
	if (stretch && shrink > 1) {
		Transform2D xform;
		xform.scale(Vector2(1, 1) / shrink);
		_send_event_to_viewports(p_event->xformed_by(xform));
	} else {
		_send_event_to_viewports(p_event);
	}
}
void SubViewportContainer::_send_event_to_viewports(const Ref<InputEvent> &p_event) {