My wife and I have the same exact phone (LG V10) and the same exact device (Vivoactive HR). Until yesterday my linked MyFitnessPal account was properly communicating between Garmin Connect and MyFitnessPal (i.e. I could see calories consumed in Garmin and exercise adjustments in MyFitnessPal). However, my wife could not get the two to communicate no matter what she did. This morning, for no explicable reason, my Garmin app stopped pulling calorie information from MyFitnessPal too. Any ideas?
