### 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 mesh_lod_threshold;
}
void Viewport::set_use_occlusion_culling(bool p_use_occlusion_culling) {
	ERR_MAIN_THREAD_GUARD;
	if (use_occlusion_culling == p_use_occlusion_culling) {
		return;
	}
	use_occlusion_culling = p_use_occlusion_culling;
	RS::get_singleton()->viewport_set_use_occlusion_culling(viewport, p_use_occlusion_culling);
	notify_property_list_changed();
}
bool Viewport::is_using_occlusion_culling() const {
	ERR_READ_THREAD_GUARD_V(false);
	return use_occlusion_culling;
}
void Viewport::set_debug_draw(DebugDraw p_debug_draw) {
	ERR_MAIN_THREAD_GUARD;
	debug_draw = p_debug_draw;
	RS::get_singleton()->viewport_set_debug_draw(viewport, RS::ViewportDebugDraw(p_debug_draw));
}
Viewport::DebugDraw Viewport::get_debug_draw() const {
	ERR_READ_THREAD_GUARD_V(DEBUG_DRAW_DISABLED);
	return debug_draw;
}
int Viewport::get_render_info(RenderInfoType p_type, RenderInfo p_info) {