So this started happening just after I installed Catalina, so I suspect it is related. I queued up a bunch of renders then noticed OSX 10.15 Catalina was released, so I downloaded it, installed it, and restarted. Then the Queue Manager started acting weird. It didn't pick up where it left off. In the past it would recover from a reboot without issue. But now it won't report status properly from the remote render engine, so I can't tell if things are completed. And images are no longer returned. I let it run for a day, but no joy. Things appeared to be running on the render PC, but nothing showed up on the source Mac. Caveat that: I got one good image back, but at least 10 others were lost in the ether. I reset the queue managers (cleared out their work) and started again. This time I got a blank image back.

Giving up on queue manager for now...

Anyone else out there have any experiences like mine?