Chrono readings may throw strange numbers from time to time, particularly field testing when variable light conditions may play havoc with the sensors. Maybe a cleaning of the sensors is called for? You don't say how old/new your chrono is, but dust plays it's part in these things as well as light.... or even battery condition??

The mechanical reaction to the load is what matters and clearly from what you said, the load is/was too hot.
Good luck with your progress. Cheers, d