Calibre 8.2.1 deleted all my Kobo collections

Hi folks,

Long-time supporter and lover of Calibre here, but I am absolutely crushed. I have 400+ books on my Kobo and they were meticulously organized into Kobo collections. Not only did the most recent Calibre update remove all my books from collections, if I try to re-add the books to collections on the device they are removed again when re-syncing with Calibre. So I guess I have three questions.

1. How do I actually add my books to collections now?

2. Am I going to have to manage collections via Calibre only and not use the device's built-in collection management?

3. Is there any way to restore all the collection attributes or are they gone forever?

Thanks in advance for any help you kind folks can provide.