Activity ended during/when recharging

Former Member
Former Member
During a lenghty ultrarun last weekend (GUCR) I had anticipated the need to recharge Fenix 5.

The charge itself is running smoothly, I continue my race and the percentage climbs up calmly. Since, of course, I want to have the heart rate data, I disconnect the cable at around 9x%, and here the watch just stops the activity. Stops and saves completely automatically.

Is this expected?

Simply put, I have configured a time alarm, but otherwise it did not change any setting eg. UltraGPS mode ect.

Planning to try to reproduce the conditions in one of the coming weeks.