If their PAX/BUSD -> USDC conversion only works during the opening hours of that New York bank, wouldn't this be well-known to everyone who tried to convert to USDC in the past? As in, what "situation" are they talking about? Going only from their tweet, there is nothing out of the ordinary happening at all...
Such a system runs along just fine, until suddenly there's huge USDC withdrawal pressure over the weekend, you can't get dollars from the bank BUSD uses to the bank USDC uses, and the USDC reserve goes empty. Wait for banks to get back into business and everything is super fine.
From the outside the above situation and a true insolvency look quite similar. It should be possible to inspect their BUSD balances on chain though?