I always close my laptop (MBP 2011 with Sierra) with Usenapp (Version 0.76.4 (Build 185) ) open just putting the display down, so the Mac stops. When I restart it, raising the display, Usenapp does not refresh all the subscriptions, and I must close and re-open the app in order to get all the new messages.
Do you need a log or a video that shows this strange behavior?