I don't know if it had anything to do with leap year, but I also checked dev tools and saw the same issue (requests for market data on March 3, 2020 on March 2, 2020 8AM PST). However, it was busted for both the website as well as the Android app (and I'm guessing iOS too) so it doesn't seem like it's purely a client-side problem unless all of their clients were built from the same source.
