Several times since SpaceX's Crew Dragon Demo-1 Mission, I have seen allusions to a minor fault.
For example, a recent article about a comparable product mentions that
After its largely successful test flight a month ago, SpaceX has been refurbishing that crewed Dragon for an in-flight abort test later this spring.
With the caveat that English is not my native tongue, I understand largely successful to mean that one or more minor aspects were not successful, but I did not find anything relevant in the linked article. However, one commenter wrote that
SpaceX launches what looked like a near-flawless unmanned mission to the ISS, and will next send a manned mission (…)
Again, near-flawless seems to imply knowledge of at least one small flaw.
However, I've failed to spot a description of something going wrong in the Wikipedia article or in other descriptions of the mission.
What went wrong during SpX-DM1?