I recently had a Raymarine Radar/Chartplotter RL70 installed. One day the GPS couldn't get fix on our position. Turned it on and off, tried a few things but nothing worked. I had a handheld GPS that did work so I know there was a signal. When I talked to the dealer, he said there is a bug in the system that Raymarine knows about and is working to fix.Anyone else having this problem?