Stopping inactive session

Occasionally when watching via Android Live Channels things will just stop....the log shows

2021/04/08 07:37:01.136810 [HLS] Stopping inactive session ch6110-dANY-ip192.168.1.244
2021/04/08 07:37:01.136990 [HLS] Stopping transcoder session ch6110-dANY-ip192.168.1.244 (out: 48m17.419s, finished: false)
2021/04/08 07:37:01.207462 [TNR] Closed connection to TVE-Philo for ch6110 SCIENCE

What is determining that the session is inactive?

You could enable http logging and then see when the requests from that IP last came in.