I keep having a reoccurring bug with the Radar and the light network on the 520. I often set the light mode to 'off' to save battery but at some point during the ride(s) it appears to switch back to a solid light mode even though I haven't selected this. Whilst not the end of the world this does have the opposite effect on what I'm trying to achieve by saving the battery.
On the 520 it will still say the light mode is set to off. Trying to change the light mode on the 520 from this point wont work. Only way to fix this is to switch the light network on and off again. Has anyone else experienced this?