I know that this (iOS) solution is wiping garmin's *** but it actually works.
Go to "Settings" > "Privacy" > "Contacts" and disable "Connect".
Now go to your watch and enable "AutoStart".
Next time you'll start your session, LiveTrack will finally work.
EDIT: It doesn't work :( ciq.forums.garmin.com/.../1469240.jpg ciq.forums.garmin.com/.../1469241.jpg