Firewall set up Hetzner Cloud

Ip Adding in Hetzner's Firewall failed. Restarting the server will of course not help either because that is not uwf that is a firewall above the operating system.

So if I added a row. 

Do you have to remove resources and then add them again.

Then all changes are really applied.

Sometimes it works immediately without any problems and suddenly stretched without removing and adding.