Child restrictions on an adult account?

My Xbox One has 2 accounts that are linked in a family. They both have adult permissions and are as unrestricted as possible, however the "child account" is unable to change the gamer profile picture and is disabled when leaves the family. Not sure what
to do, I tried leaving and re-joining.

:)

 

Content Restrictions

Hi, is your account under parental controls ?

If that's the case then the parental account will need to sign in and change any restrictions on your account.

If that's not the case and your account is an adult account and you also have a child account signed in that has content restrictions set then those restrictions will also affect the adult account until the child account signs out.

support.xbox.com/.../child-and-adult-signed-in

 

Purchases of this content is currently not allowed for child or teen accounts

You changing their Privacy Settings from Child to Adult doesn't change the account status to adult itself. So pretty much their accounts are still child. It will be possible to change it to adult as soon as they reach 18. If that is the age of an adult in
your country ofc. You cannot change that setting manually. The restriction on downloadable content stays locked until they reach the required age depending on the content age restriction.