In a Marketing Campaign and in the communication section of wave, a user clicks on a company name but the communication summary screen is displayed instead of the company summary screen.
The cause of this was that the field on this list, in this case "comm_link: Company", was set to hyperlink to communication instead of company.
To resolve this, navigate to Administration -> Customisation -> Communication -> Lists and select the CommunicationList.
Change the "Hyperlink to:" field from Communication to Company and do a metadata refresh.
The Company name hyperlink will open the company summary screen.