This has been an ongoing issue that never seems to be resolved. When I use the [Sorted by Most Played] view, there are multiples of the same album in the list. In fact the list changes (but is still wrong) if I change the sort order. The sort shows more albums than exist.
Every once in a while it seems to resolve itself. I had switched core servers from an Ubuntu server to a QNAP NAS and the problem had gone away (temporarily). But now with the new release the problem is back.
PC Client 1.6 (build 390) 64bit - But the problem also occurs on my android tablets.
Core QNAP 1.6 (build 390) 64bit
Play tracking is the number one reason I subscribed to Roon.