### 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 (text_direction == Control::TEXT_DIRECTION_INHERITED) {
		TS->shaped_text_set_direction(text_rid, is_layout_rtl() ? TextServer::DIRECTION_RTL : TextServer::DIRECTION_LTR);
	} else {
		TS->shaped_text_set_direction(text_rid, (TextServer::Direction)text_direction);
	}
	TS->shaped_text_set_preserve_control(text_rid, draw_control_chars);
	TS->shaped_text_add_string(text_rid, t, font->get_rids(), font_size, font->get_opentype_features(), language);
	TS->shaped_text_set_bidi_override(text_rid, structured_text_parser(st_parser, st_args, t));
	full_width = TS->shaped_text_get_size(text_rid).x;
	_fit_to_width();
	Size2 size = TS->shaped_text_get_size(text_rid);
	if ((expand_to_text_length && old_size.x != size.x) || (old_size.y != size.y)) {
		update_minimum_size();
	}
}
void LineEdit::_fit_to_width() {
	if (alignment == HORIZONTAL_ALIGNMENT_FILL) {
		Ref<StyleBox> style = theme_cache.normal;
		int t_width = get_size().width - style->get_margin(SIDE_RIGHT) - style->get_margin(SIDE_LEFT);
		bool using_placeholder = text.is_empty() && ime_text.is_empty();
		bool display_clear_icon = !using_placeholder && is_editable() && clear_button_enabled;
		if (right_icon.is_valid() || display_clear_icon) {
			Ref<Texture2D> r_icon = display_clear_icon ? theme_cache.clear_icon : right_icon;
			t_width -= r_icon->get_width();
		}
		TS->shaped_text_fit_to_width(text_rid, MAX(t_width, full_width));
	}
}
void LineEdit::_clear_redo() {