The precise navigation of car navigation is still realized by satellite receiver. If the receiver fails or is blocked, it will not be able to locate. For car navigation, there will be a time to search for stars every time you start, which will be slightly longer depending on the environment and terminal. If searching for stars is impossible or slow, try again in another place.
Because the satellite status is different every day, the signal may be full in the same place, and the signal will be weak in another time period, and this situation will appear more.