The visibility of Rapid Boards is based on the Shares of a filter. If a JIRA administrator shall do some changes in a Rapid Board configuration, he is only able to do so, if he is somehow included in the Share of the filter.

This isn't the optimal in all cases.

• When using cross-project Rapid Boards, with the filter shared with a user group, but with the user group normally not including any JIRA administrators. That means that the Rapid Board is not visible to the JIRA admin and therefore the owner of the Rapid Board is the only one who can do configure the board.
• When the board owner or one of the admins changes the board filter to a private one, they lock all other admins out of it. Neither JIRA admins nor users that are Board administrators cannot access the board because of the missing filter share.

That should be changes, so that a JIRA admin can see and configure all Rapid Boards, even if he is not included in the Shares of a filter. Alternatively, the "Board administrator" setting should override the filter share settings.