Hi - This is kind of related to the recent post about blanking sub names. In the group/subscription pane, if you select a group for editing - or even just copying the name and make no change, no matter what you do next, the sub will be renamed “No Name”
You can fix it by right-clicking -> Edit Subscription and changing it back, but it seems that any edits here should stick, and certainly if no edit is made, it should remain what it was and not change to No Name.
Can send a screen vid grab of the behavior if needed.
Cheers!