### 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_READ_THREAD_GUARD_V(0);
	return RS::get_singleton()->viewport_get_render_info(viewport, RS::ViewportRenderInfoType(p_type), RS::ViewportRenderInfo(p_info));
}
void Viewport::set_snap_controls_to_pixels(bool p_enable) {
	ERR_MAIN_THREAD_GUARD;
	snap_controls_to_pixels = p_enable;
}
bool Viewport::is_snap_controls_to_pixels_enabled() const {
	ERR_READ_THREAD_GUARD_V(false);
	return snap_controls_to_pixels;
}
void Viewport::set_snap_2d_transforms_to_pixel(bool p_enable) {
	ERR_MAIN_THREAD_GUARD;
	snap_2d_transforms_to_pixel = p_enable;
	RS::get_singleton()->viewport_set_snap_2d_transforms_to_pixel(viewport, snap_2d_transforms_to_pixel);
}
bool Viewport::is_snap_2d_transforms_to_pixel_enabled() const {
	ERR_READ_THREAD_GUARD_V(false);
	return snap_2d_transforms_to_pixel;
}
void Viewport::set_snap_2d_vertices_to_pixel(bool p_enable) {
	ERR_MAIN_THREAD_GUARD;
	snap_2d_vertices_to_pixel = p_enable;
	RS::get_singleton()->viewport_set_snap_2d_vertices_to_pixel(viewport, snap_2d_vertices_to_pixel);
}
bool Viewport::is_snap_2d_vertices_to_pixel_enabled() const {
	ERR_READ_THREAD_GUARD_V(false);
	return snap_2d_vertices_to_pixel;
}
bool Viewport::gui_is_dragging() const {