[knot-resolver-users] DoH connection closed after 10 seconds

Hello, it's me again :) I just want to make sure if behaviour of Knot Resolver is correct. I implemented DDR mechanism to discover DoH / DoT DNS servers. My Macbook with Ventura successfully discovered DoH server and started to use it. But: Knot Resolver sends 10 seconds after establishing FIN,ACK packet and connection is correctly closed. From this moment, Macbook starts to use DNS over UDP again and will retry DoH connection after 10-30s later. Then it uses DoH server again for 10 seconds .... Is this behaviour correct? Should Macbook sends some keepalive messages to prevent connection closing? Or should Macbook reopen DoH connection more quickly? Thanks, Blažej