Unable to create share in Photos app with custom user group

General Discussion
1

I have a custom user group created in settings named “family”. However, only the “Administrator” group shows in album sharing.

Administrator group in album share dialog
Administrator group in album share dialog621×356 21 KB

Out of curiosity, I checked the network logs, and there is a request to an endpoint named -/shareUserList which contains a list of users and user groups (with family):

// ...
            {
                "gid": 1000,
                "name": "family",
                "full_name": "family"
            }
// ...

So, the UI definitely has the “family” group, but isn’t showing it in the user groups… Has anyone found a fix or workaround for this?