XEP-Remarks/XEP-0260: Jingle SOCKS5 Bytestreams Transport Method

"If the nominated candidate is of the proxy type and either party cannot connect to the proxy (for example because of a restrictive firewall), the failing party shall send a transport-info message containing an  element. The parties shall then consider the bytestream unsuccessful and SHOULD attempt to fall back to another transport as described in Fallback Methods."

This is a little bit weird. If remote send me proxy candidate and I can't connect to any remote candidate including this proxy, I would rather send .