I am using a 310XT with the latest firmware (4.2).
Since December 5th all of my indoor bike rides (bike on a turbo trainer with a GSC10 and GPS turned off) are recording a number in the Total Strokes column of Garmin Connect. (see Pic)
Why? - this can't be right.... or is it to represent the total number of crank revolutions?
Separately... ALL of the average & max HR data columns are empty in the Activities View (see Pic)