Not necessarily. It would depend upon the nature of the 'unresolved matter'. In some circumstances there will be a duty of confidentiality but there are also times when the local authority might be legally required to divulge information to anyone who asks. For example, if the 'unresolved matter' relates to a planning application, the local authority is bound to ensure that all materials relating to the application (including the application itself and any letters objecting to it) are placed in the public domain.
Without further information, relating to specific circumstances, it's impossible to state whether there has been any irregularity.
Chris