If this happens again, please output the brake setting to your screen (go to SETTINGS, DATA INPUT & OUTPUT, pick row 14, 4th box from the left).
Now you should be able to see how much (and if) your brakes are employed...
Let me know if this crops up again - ideally take a short movie, showing N1, GS readout on EHSI and also report the airport, grossweight and temperature.
Thanks, Jan