Topic: Issue with navigation guides

[hollada]

I have been having an issue with navigation.  I select my go to point and the boundary lines display (guiding me to selected go-to point).  As I am running down the lake, if I hit a wave the guidance disappears. 

If I hit menu, I have the option to cancel navigation so it still thinks I am navigating to the point, but there are no boundary lines or path showing in the gps screen.

Anyone have this happen or no how to correct it?  Based on the fact that it goes away typically when I hit a wave, I assume its electrical.  But my screen doesn't flicker, the unit doesn't go out etc.  could a short in the power to my Ethernet switch cause this?