### 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)

}
#define MENU_ITEM_DISABLED(m_menu, m_id, m_disabled) \
	idx = m_menu->get_item_index(m_id);              \
	if (idx >= 0) {                                  \
		m_menu->set_item_disabled(idx, m_disabled);  \
	}
#define MENU_ITEM_CHECKED(m_menu, m_id, m_checked) \
	idx = m_menu->get_item_index(m_id);            \
	if (idx >= 0) {                                \
		m_menu->set_item_checked(idx, m_checked);  \
	}
	MENU_ITEM_ACTION_DISABLED(menu, MENU_CUT, "ui_cut", !editable)
	MENU_ITEM_ACTION(menu, MENU_COPY, "ui_copy")
	MENU_ITEM_ACTION_DISABLED(menu, MENU_PASTE, "ui_paste", !editable)
	MENU_ITEM_ACTION_DISABLED(menu, MENU_SELECT_ALL, "ui_text_select_all", !selecting_enabled)
	MENU_ITEM_DISABLED(menu, MENU_CLEAR, !editable)
	MENU_ITEM_ACTION_DISABLED(menu, MENU_UNDO, "ui_undo", !editable || !has_undo())
	MENU_ITEM_ACTION_DISABLED(menu, MENU_REDO, "ui_redo", !editable || !has_redo())
	MENU_ITEM_CHECKED(menu_dir, MENU_DIR_INHERITED, text_direction == TEXT_DIRECTION_INHERITED)
	MENU_ITEM_CHECKED(menu_dir, MENU_DIR_AUTO, text_direction == TEXT_DIRECTION_AUTO)
	MENU_ITEM_CHECKED(menu_dir, MENU_DIR_LTR, text_direction == TEXT_DIRECTION_LTR)
	MENU_ITEM_CHECKED(menu_dir, MENU_DIR_RTL, text_direction == TEXT_DIRECTION_RTL)
	MENU_ITEM_CHECKED(menu, MENU_DISPLAY_UCC, draw_control_chars)
	MENU_ITEM_DISABLED(menu, MENU_SUBMENU_INSERT_UCC, !editable)
#undef MENU_ITEM_ACTION_DISABLED
#undef MENU_ITEM_ACTION
#undef MENU_ITEM_DISABLED
#undef MENU_ITEM_CHECKED
}
void LineEdit::_validate_property(PropertyInfo &p_property) const {