All control plane packets that require an RTM lookup and whose destination is reachable over the RSVP shortcut are forwarded over the shortcut. This is because RTM keeps a single route entry for each prefix unless there is ECMP over different outgoing interfaces.
Interface bound control packets are not impacted by the RSVP shortcut because RSVP LSPs with a destination address different than the router-id are not included by IGP in its SPF calculation.