Tvheadend

I am having problems recording with TVH 4.2.8, Kodi 18.2, UB 18.04, WinTV-QuadHD. It will record a couple/few parts of a series. At some point TVH will start the scheduled recording and then 10-odd seconds later say 'Recording Completed'. No recording. No Failed recording. Have tried messing around with 'record all episodes' and using full description. What am I doing wrong? How should I proceed?