Lee, as requested, here are the test results relevant to my post. Completed transfers 259, Interrupted 229, Stalled 35.

Two further test periods produced similar figures, 203/225/25 and 225/217/19. Slightly different conditions for each period (although I doubt that they would contribute). For the first test, "show completed transfers" was activated - but not for the second. I did not access the Monitor tab at any time during either of these test periods, but did for the third, "show" being activated again.

I look forward to your interpretation of these figures. Thanks for your interest.