Constant "Remote Grading Error" popups?

Many weeks ago I did a Remote Grading session, but I continue to get a "Remote Grading Error" popup. telling me that it cannot connect to the remote system.

My Remote Grading Client panel says that it's disconnected, and doesn't even have the "Remote Machine" IP address in the field anymore, so I'm not sure why I'm still getting this error. I dismiss the popup, and never see it again for the rest of the day.

This issue continues to occur even after system reboots and installing new point-updates of Resolve 16.2.x since the problem started occurring.

Another observation is that this popup seems to come up usually when I leave Resolve running overnight, and I wake my computer display up.

A part of me is wondering if this is being triggered by external portscans being done on my WAN IP by people looking for vulnerabilities? I have a port-forward enabled for Resolve Remote Grading on my router.

This is started on 16.2.3.015 on macOS 10.14.6, and continues to occur on 16.2.7.

Logfiles attached.