Note: This bug has been present for a long time, and is still present in V5.44 PR2

For box sets, if you perform a "Move to Group" operation on the Parent record in a box-set (e.g., from "Owned, For Keeps" to "Owned, For Sale or Trade"), the Group membership of all the Child records of the box set should be moved to the new Group as well. It makes no sense for the Child records to remain "Owned, For Keeps" if the Parent is "Owned, For Sale or Trade". Having to manually change the Group membership of every Child record (especially large box sets) to match the Parent is a bug.

The practical impact of this bug is that on the client display, all of the Child records are displayed as well as the Parent since their Group membership is different. Normally, only the Parent record is displayed on the client if both the Parent and all the Child records belong to the same Group, such as "Owned, For Keeps".

I've run into this on a number of box sets -- most recently Barcode = 5050582912807 ("Alfred Hitchcock: The Masterpiece Collection"), which has 14 Child records.