### 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 (!menu) {
		const_cast<LineEdit *>(this)->_generate_context_menu();
	}
	return menu;
}
void LineEdit::_editor_settings_changed() {
#ifdef TOOLS_ENABLED
	set_caret_blink_enabled(EDITOR_GET("text_editor/appearance/caret/caret_blink"));
	set_caret_blink_interval(EDITOR_GET("text_editor/appearance/caret/caret_blink_interval"));
#endif
}
void LineEdit::set_expand_to_text_length_enabled(bool p_enabled) {
	expand_to_text_length = p_enabled;
	update_minimum_size();
	set_caret_column(caret_column);
}
bool LineEdit::is_expand_to_text_length_enabled() const {
	return expand_to_text_length;
}
void LineEdit::set_clear_button_enabled(bool p_enabled) {
	if (clear_button_enabled == p_enabled) {
		return;
	}
	clear_button_enabled = p_enabled;
	_fit_to_width();
	update_minimum_size();
	queue_redraw();
}
bool LineEdit::is_clear_button_enabled() const {