### 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)

bool last_press_inside = clear_button_status.pressing_inside;
			clear_button_status.pressing_inside = clear_button_status.press_attempt && _is_over_clear_button(m->get_position());
			if (last_press_inside != clear_button_status.pressing_inside) {
				queue_redraw();
			}
		}
		if (m->get_button_mask().has_flag(MouseButtonMask::LEFT)) {
			if (selection.creating) {
				set_caret_at_pixel_pos(m->get_position().x);
				selection_fill_at_caret();
			}
		}
		if (drag_action && can_drop_data(m->get_position(), get_viewport()->gui_get_drag_data())) {
			drag_caret_force_displayed = true;
			set_caret_at_pixel_pos(m->get_position().x);
		}
		return;
	}
	Ref<InputEventKey> k = p_event;
	if (k.is_valid()) {
		if (!k->is_pressed()) {
			if (alt_start && k->get_keycode() == Key::ALT) {
				alt_start = false;
				if ((alt_code > 0x31 && alt_code < 0xd800) || (alt_code > 0xdfff && alt_code <= 0x10ffff)) {
					char32_t ucodestr[2] = { (char32_t)alt_code, 0 };
					insert_text_at_caret(ucodestr);
				}
				accept_event();
				return;
			}