Bug: Series not collapsing correctly

Description of your request or bug report:

The series collapses fine in “wish list”, but the books in “owned” are listed separately.

Trello link:

Another occurrence:

Seems like the problem is usually with volume 1 of the series, the other volumes behave as expected.

Another example in my Japanese library:

I’d guess it’s something to do with the first volume being added before the other volumes have populated. :thinking:

Private report (a57b2f9b-398e-4b03-9c06-5b8ba492c662) and (e77809a7-c922-494b-a956-f4fbe6d85ff4) potentially related with also collapsing issues.