Hi, I updated my 530 to 5.50 fw from 5.10 and and then 1 freeze screen after start-up, 1 freeze at shutdown screen, and today in 1h:15min indoor riding there was 1min:30sec sensors drop section(stages left craft g3 powermeter and garmin speed g1 sensor). well at least heartrate chest strap was stable in the riding. and here the riding is https://connect.garmin.com/modern/activity/4979925325 .
I am going to back 5.10 till new problemless update.