This is the same way my 1197 reacts after I've had the Navionics card out of the unit....and it's something I still don't understand...
The Navionics data is "overlayed" onto the base map background....so I don't think the Navionics data is ever really stored into the unit internal memory....this would seem it likely that the Navionics data would have to be loaded and "overlayed" each time the unit is powered on....
But it seems quicker when just powering on the unit than if the card has actually been removed...which takes longer to load and "overlay" the Navionic data...
Maybe it's just a mystery of life...
Rickie