### 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)

camera_3d_set.insert(p_camera);
	return camera_3d_set.size() == 1;
}
void Viewport::_camera_3d_remove(Camera3D *p_camera) {
	camera_3d_set.erase(p_camera);
	if (camera_3d == p_camera) {
		camera_3d->notification(Camera3D::NOTIFICATION_LOST_CURRENT);
		camera_3d = nullptr;
	}
}
void Viewport::_camera_3d_make_next_current(Camera3D *p_exclude) {
	for (Camera3D *E : camera_3d_set) {
		if (p_exclude == E) {
			continue;
		}
		if (!E->is_inside_tree()) {
			continue;
		}
		if (camera_3d != nullptr) {
			return;
		}
		E->make_current();
	}
}
void Viewport::enable_camera_3d_override(bool p_enable) {