Sorry for the late reply, it took this long for the issue to show up, the logs have been uploaded and currently the problem is happening.
I have also attached a screenshot with the issue in action.
How I noticed it, there is an increase in activity right now on the CPU. In addition you can see from the attached top screenshot there is a sprawl in "UPDATE_3" processes.
Mover is scheduled for 1st of month, so this doesn't look like a mover issue, but a BRTFS issue.
Look forward to a resolution.
blackbox-diagnostics-20230213-2208.zip