This is within the jira service management.
Whilst submitting a request, as an admin I can test the picker and see other users that I can add, as a user I can't see other users.
I have endlessly checked permissions, global and project based, to no avail. I'm guessing there is a setting somewhere that I'm missing potentially to do with privacy. Or the users I'm seeing as an admin are cached in some way and aren't actually based off any kind of permissions. TIA