Iflight gps issue

My gps when powered(by vifly gps mate ) has a solid green light (that I presume mean a 3D fix;but a red gps icon in bf ) and when I go into betaflight there is no satellites to be seen(but loads appear when I first turn on my quad, then disappear) so I’m just wondering what’s going on here as my cables all ok (tx to rx and so on ) ?