Compared to my original desire the DHD has terrible GPS. In tests between the two, the DHD takes between 2-3 times as long to get a fix, these tests are done using GPS status as it downloads the GPS assist data. Also noticed that side by side both phones in same position, they give completely different readings as to where north and south is. Tries the DHD with and without the gel skin, and it seems to make no real difference, will try it with the wireless networks setting disabled to see if it makes a difference.
And to the OP, yes my DHD has done exact same thing when using google maps, but never noticed it do it with copilot, had to switch off maps and restart to get GPS to work again, which it did for the rest of the journey, second time it did it, it regained the signal itself after a short time.