Client List Report; data export of Communications flags incorrect

The Client List Report data export of Communications flags was incorrect, if using the "Preview" button.

The following columns show as a checkbox, but are undefined (black square) rather than check or unchecked.

CommunicationGeneralE
CommunicationGeneralL
CommunicationGeneralS
CommunicationGeneralV
CommunicationMarketingE
CommunicationMarketingL
CommunicationMarketingS
CommunicationMarketingV