It is a minor bug.
Just after start when I switch to my download list (sorted by progress %) almost the whole list is sorted ok, but one random item is taken from the list and put as the last item.
Let's say instead of
10% 15% 30% 60% 80% 90% 98%
I get
10% 15% 60% 80% 90% 98% 30%
after a few seconds re-sort event is triggered and the list is sorted properly this time.