Tvheadend

TVheadend is losing many of my recordings. They seem to start and end OK but are not available and have the status "Time missed".
An example of an autorec (series link) recording lost on my Ubuntu Bionic server below. An extract of the DVR log from the latest attempt below
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2019-01-02 19:29:30.004 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 - set state - state RECORDING rec_state PENDING error 'OK'
2019-01-02 19:29:30.004 [ INFO]:dvr: "Coronation Street" on "STV HD" recorder starting
2019-01-02 19:29:30.004 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 original stop 2019-01-02;20:00:00(+0000) stop 2019-01-02;20:00:00(+0000) - stop timer set
2019-01-02 19:29:30.005 [ INFO]:mpegts: 11067.5V in DVB-S Network - tuning on SAT>IP DVB-S Tuner #1 (192.168.1.17@UDP)
2019-01-02 19:29:30.005 [ INFO]:subscription: 0009: "DVR: Coronation Street" subscribing on channel "STV HD", weight: 300, adapter: "SAT>IP DVB-S Tuner #1 (192.168.1.17@UDP)", network: "DVB-S Ne$
2019-01-02 19:29:30.005 [ TRACE]:dvr: 39cdfd44a980d61a7d005ef3f588dc78 - recoding thread started for "Coronation Street"
2019-01-02 19:29:30.278 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 - set state - state RECORDING rec_state EPGWAIT error 'OK'
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2019-01-02 20:00:00.006 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 rstart 1970-01-01;01:00:00(+0100) rstop 2019-01-02;19:27:25(+0000) - stop recording timer called
2019-01-02 20:00:00.006 [ INFO]:subscription: 0009: "DVR: Coronation Street" unsubscribing from "STV HD", username="tv"
2019-01-02 20:00:00.006 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 - set state - state MISSEDTM rec_state FINISHED error 'OK'
2019-01-02 20:00:00.006 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 when 1970-01-01;01:00:00(+0100) - retention arm
2019-01-02 20:00:00.006 [ INFO]:dvr: "Coronation Street" on "STV HD": End of program: Time missed
2019-01-02 20:00:00.006 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 start 2019-01-02;19:29:30(+0000) stop 2019-01-02;20:00:00(+0000) - set timer
2019-01-02 20:00:00.006 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 - set state - state COMPLETED rec_state FINISHED error 'OK'
2019-01-02 20:00:00.007 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 when 1970-01-01;01:00:00(+0100) - retention arm
2019-01-02 20:00:00.007 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 when 1970-01-01;01:00:00(+0100) - retention arm
2019-01-02 20:00:00.007 [ TRACE]:dvr: entry 39cdfd44a980d61a7d005ef3f588dc78 - retention timer - disarm
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