Communications. The Zoning Hearing Board or hearing officer shall not communicate, directly or indirectly, with any party or his/her representatives in connection with any issue involved except upon notice and opportunity for all parties to participate, shall not take notice of any communication, reports, staff, memoranda, or other materials, except advice from their solicitor, unless the parties are afforded an opportunity to contest the material, and shall not inspect the site or its surroundings after the commencement of the hearings with any party or his representative unless all parties are given an opportunity to be present.