Just to say I've seen this in both Catalina and now Big Sur too, sometimes Usenapp doesn't recover from a sleep and even though the auto "get latest" counter keeps hitting zero nothing is fetched. "Queue" shows "Download" for all connection threads. A Cancel and retry works (I remember you pointed that out to me to try), or of course a restart of Usenapp. It doesn't happen all the time, but I'll try and catch a video as well.