If you restart the tvheadend service and try scanning a mix again, you get this error:
2015-08-18 19:32:48.000 mpegts: 10729V in Freesat - tuning on SAT>IP DVB-S Tuner #1 (192.168.1.103)
2015-08-18 19:32:48.000 subscription: 0004: "scan" subscribing to mux "10729V", weight: 2, adapter: "SAT>IP DVB-S Tuner #1 (192.168.1.103)", network: "Freesat", service: "Raw PID Subscription"
2015-08-18 19:32:48.483 satip: SAT>IP DVB-S Tuner #1 (192.168.1.103) - RTSP SETUP error -5 (Input/output error) [6-403]
2015-08-18 19:32:58.000 mpegts: 10729V in Freesat - scan no data, failed
2015-08-18 19:32:58.000 subscription: 0004: "scan" unsubscribing
Anyone know what the RTSP SETUP error -5 (Input/output error) means? Is it related to bug 3005?