First we had the problem with the collapsed view who wasn’t working properly.
No we discovered another problem. The sorting isn’t working. Neither in the View “All FAQ”, “Custom FAQ”, nor “Nested FAQ”. I can sort the FAQ in the Admin menu.
The “All FAQ”-Page (Admin Backend) show me the FAQs properly sorted. On a normal page with shortcode i can only switch between ASC and DESC. Both show me the FAQ in the order the entries where created and ignore the custom sorting order.