PMS status shows Live session now playing when there is none

I’m trying out live TV on iOS which is working brilliantly. After stopping the stream I looked at PMS status and it shows the live session is still playing. When I try to stop play back on PMS I get the error message saying ‘there was a problem stopping playback’.

The only way to resolve is to quit PMS and restart.

I’m using Plex PMS v1.7.3.3937 on Qnap TVS473 and Plex app on iOS 10.3.2