Contacts App issues on macOS Sonoma

On macOS Sonoma, in the Contacts app, I am having three issues related to lists:

1. I am unable to create a new contacts list with a descriptive name. When I create a new list and type the name, as soon as I hit return it reverts to "untitled list."
2. If I attempt to rename the list through the Edit menu, the option to rename is grayed out.
3. Except for once this morning, I am further unable to delete lists from the Edit menu, since that option is also grayed out.

My Contacts syncs to iCloud, which is my only account service on Contacts. I'll note that I'm able to go in through Contacts on my iPhone to appropriately create/rename/delete lists, and it instantly updates on the sidebar on my Mac -- so the iCloud sync is working properly.

[Re-Titled by Moderator]