Hello,
I updated my 540 Solar to 19.19 this past weekend. Went for a ride on Sunday, and it lost the first ~4mi of my ride. Today, went for another ride. Paused the workout to take a picture, and the device appeared to crash (rebooted). After resuming it seemed okay until I finished the workout and it lost another 3mi of the ride.
I had no issues with 18.25, so instructions and a download would be much appreciated.