I often navigate only by looking at the route displayed on the screen. According to the manual: https://www8.garmin.com/manuals/webhelp/edge530/EN-US/GUID-A90DA84C-389E-4DFA-9A85-CD698C4B4E63.html (I use "Always Display" and color , mostly red).
A few months ago it happened that the course line disappeared on the screen and returned after about 10 km. Today the situation repeated. What to do with this?