I have had the same problems. I’m no engineer but have to wonder if Wahoo’s drift into color hasn’t taken away from the simplicity and reliability of their product. No color was a selling point for them in the beginning—and helped sell me on their product.
Meanwhile, thank you, Charlie, for outlining the current best practice. I submitted a ticket yesterday and was told I shouldn’t have the same problems with a replacement unit on long rides. I loved Garmin initially but all my devices got, for lack of a better term, too squirrelly for me—undependable, essentially.
These device issues underscore the need to keep ready to navigate by cue sheet, which is sort of fun if you have a set up with which you can actually read the sheets! Not an endless line on a screen but one next turn or set of directions after another on a printed page.
Every brevet is an adventure of the spirit!