I am using Garmin 520 plus more about 3/4 yearamd IT works smoothly, but recetly on my ride when i stopped and went to the shop and came back and wanted to drive my heart rate And cadence wern't showing on the screen i tried to cenecting them manualy but it was just spinning . Next day when I went for a ride was ok but after short stop IT happend again no cadence no heart ratei tried to turn Garmin on off And IT Popped right back, And Now sometimes it drops out the data for short time And then back.I have in my settings auto-pause maybe this couses the problems with disconecting sensors. No idea, changed batteries but still happening. Please help it Is ruining mi trainings graphs