Fondo problems logging companion


I ride yesterday 10 March the Fondo series. 92 km. But after 45km my chain dropped off. So I put it back on (1 minute work) and start riding again. But then the list with the other

s riders was empty. On companion app, I didn’t see power or heart rate anymore. On television my distance and speed and heartrate still worked with ant+ antenne laptop connection. But I was alone. What happened? And how can I resolve this problem in the future? Is it because I Stopped riding for my chain? I ride the complete 100 km. But activity feed says 47km…