von Eva Koperdakova.
Well, thanks for hint. I had a look at forum mentioned. They say to run 4.5.6 (I do) and that fix will come out in October. I do update every month, but last was by the end of September. The next one is planned by the end of month, it will be 4.5.7+, so I'll see whether it is fixed and how it affects backup notifications.
e.k.
e.k.