Generate feed – only first author is listed

When generating feeds from https://rcfeed.rcdata.org/generate/, only the first author of an exposition shows up in the feed.

Example: Create a feed for the University of Inland Norway portal, and filter for the "staff" keyword. The exposition titled "Noen prosjekter i regi av forskningsgruppen "Artistic Research in Sound and Music" has six authors, but only the first one shows up.