### Godot version

v4.2.dev4.official [549fcce5f]

### System information

Windows 10

### Issue description

`scene/main/node.cpp:1757 - Parameter "p_node" is null.` when attempting to type after using find function. Does not happen in 4.2dev3.

https://github.com/godotengine/godot/assets/3820082/4a2818f7-cc3b-4b46-a0b1-5bc6a85b4abc


### Steps to reproduce

1) Open any script in the script editor
2) Ctrl+F to select some text that exists in the script
3) Hit escape to re-focus the script editor without placing the caret
4) Attempt to type



### Minimal reproduction project

[find-mrp.zip](https://github.com/godotengine/godot/files/12555561/find-mrp.zip)

if (language != p_language) {
		language = p_language;
		_shape();
		queue_redraw();
	}
}
String LineEdit::get_language() const {
	return language;
}
void LineEdit::set_draw_control_chars(bool p_draw_control_chars) {
	if (draw_control_chars != p_draw_control_chars) {
		draw_control_chars = p_draw_control_chars;
		if (menu && menu->get_item_index(MENU_DISPLAY_UCC) >= 0) {
			menu->set_item_checked(menu->get_item_index(MENU_DISPLAY_UCC), draw_control_chars);
		}
		_shape();
		queue_redraw();
	}
}
bool LineEdit::get_draw_control_chars() const {
	return draw_control_chars;
}
void LineEdit::set_structured_text_bidi_override(TextServer::StructuredTextParser p_parser) {
	if (st_parser != p_parser) {
		st_parser = p_parser;
		_shape();
		queue_redraw();
	}
}
TextServer::StructuredTextParser LineEdit::get_structured_text_bidi_override() const {