Is GroupTrack working at each attempt for you?

Has anybody got working GroupTrack for Fenix 5/5S Plus at each attempt? For my Fenix 5 plus (fw 4.74) it is working on random base, my connection with Fenix 5S Plus (fw 4.74) is added on approx. every 10th started activity after one up to three minutes since we started live track activity, better to say it is working on random base... so it is unusable feature for me. What is your experience please?