All the users in my instance are members of the group:
I've appropriately set the permissions for assignable users to include this group.
But my custom field still doesn't display any users, and instead says "No options"
What am I missing here?
I believe so. This is the setting you're referring to, correct? (screenshot below)
And I can confirm that the jira-software-users is the default group, that I'm a member, along with 18 other people.
What's particularly odd is that the Assigned To field works fine; but it's a custom single-user picker field that shows "No options".
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