### 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)

Color font_selected_color = theme_cache.font_selected_color;
			Color caret_color = theme_cache.caret_color;
			
			if (using_placeholder) {
				font_color = theme_cache.font_placeholder_color;
			}
			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;
				Color color_icon(1, 1, 1, !is_editable() ? .5 * .9 : .9);
				if (display_clear_icon) {
					if (clear_button_status.press_attempt && clear_button_status.pressing_inside) {
						color_icon = theme_cache.clear_button_color_pressed;
					} else {
						color_icon = theme_cache.clear_button_color;
					}
				}
				r_icon->draw(ci, Point2(width - r_icon->get_width() - style->get_margin(SIDE_RIGHT), height / 2 - r_icon->get_height() / 2), color_icon);
				if (alignment == HORIZONTAL_ALIGNMENT_CENTER) {
					if (Math::is_zero_approx(scroll_offset)) {
						x_ofs = MAX(style->get_margin(SIDE_LEFT), int(size.width - text_width - r_icon->get_width() - style->get_margin(SIDE_RIGHT) * 2) / 2);
					}
				} else {
					x_ofs = MAX(style->get_margin(SIDE_LEFT), x_ofs - r_icon->get_width() - style->get_margin(SIDE_RIGHT));
				}
				ofs_max -= r_icon->get_width();
			}
			
			Vector2 ofs = Point2(x_ofs + scroll_offset, y_ofs);
			if (selection.enabled) {