Doesn't seem to have been qcharts - reportedly the CME market data network feed stalled for about 10 minutes starting at 3pm. That seems reasonable since the charts for the YMs did not stall but it looks like all CME data did. Isn't 3pm when the CME shifts some Globex contracts (like EC and BP) to the next day?? Maybe some technician goofed.
Most exchanges, data vendors, and brokers have multiple different quote feeds, order management systems, and network connections. It's possible for any of those systems or connections to go down and affect some brokers or data vendors while not affecting others.