Was this originally discovered by Adam Ragusea? He mentioned it in his video about it before all the press came out about the error, and said he emailed the authors.
I wondered that as well. Shame they didn't give him credit if he truly was the first one to point it out.
I've never been too sure how closely he's reading those papers he refers to in his informational vids; if he actually discovered a flaw himself from reading one that is highly indicative he's doing a good job!