Yep I saw the match also said it was in progress. I would think that if a bug is shown in the API it also appears on the webpage since they get the information from the same place (I assume). Altough I dont really know since this is the first bug I found.
I was testing out my Java son trying to crash it and it seems I crashed something else.
https://www.chess.com/club/matches/734460
This match appears as "in_progress" when the two games it has have finished.
https://api.chess.com/pub/match/734460
Is this something rare that happens from time to time?