It appears the Edge 25 can pair to at least two HR monitors and remember them both. Then, when it is turned on it will connect to either/or if they are simultaneously active. This is not acceptable because when I ride with my partner who is using one of the paired HR monitors, hers often connects and I'm receiving her heart rate, not mine.
Based on other devices (Forerunner watches) I would expect the Edge 25 to overwrite/forget the previous HR monitor whenever a new one gets paired, but this does not happen.
Is there a way to un-pair both and start over?