I don't think there's much to say about it unfortunately. It was a missed putt.
If anything maybe the DGPT says something about being more stringent about the condition of equipment at their events. After the fact one of the other players on the card (don't remember who) was jamming his putter into that exact section of the basket to recreate the fall out and the disc didn't even come close. It was a total fluke…dunno what you can say other than that?
The group did eventually get a putter to fall through the same spot. One of the commentators in post-produced coverage mentioned that the basket may have been damaged previously, and repaired (re-welded) in such a way to leave the opening a bit smaller on one side and a bit larger on the other. Total fluke.