i've downloaded new 6.20 update into my vivoactive 4. it does fixed the freezing gps, and i have to try if it works faster in open spaces... so i will come back :) it solved and fixed partially the countdown vibration! infact till version 6 the vibration countdown started at 5 second to 0, vibrating each second and making a longer vibration at finish. now it start at 3 to 0! this is not enough time to settle me into new exercise and it has a problem with HR notification because it show 10 second before and continuing till countdown of 3. Please, fix this little problem and restore countdown from 3 to 5 second.