On a secret page, "created by" and the author of each version showed a raw identifier such as u-019fa503-f9d3-750e-a415-eb87b6fb708e, which told you nothing about who had written the value.
They now resolve against the members of your organization: the display name when there is one, the email otherwise. If the member list can't be loaded, the page falls back to the handle rather than failing.