The reason for the sharp deviations of the GPS track?

Question

satellite navigation

When recording a track with GPS in the android application, sharp deviations of the point from the route appear. It is known that the receiver was not in this place, the deviation can reach tens of kilometers.
How can I find information on this issue? Have you met her?
The track looks like this. Deviations are always "sharp".

The action takes place in Moscow, within the Moscow Ring Road (to the size of the settlement and the density of the BS).

Answer 1

As an option - at this moment the satellite is lost and geotracking takes coordinates from the towers. It won’t pull on 10 km, but on a couple - easily.
I saw errors once and in a thousand km - but it was real once and was more likely due to an error in the map software than in the GPS itself

Answer 2

All "deviations" lie on the nearest large street, perhaps you get coordinates not only by GPS, but also by network, you can still try other applications and another phone, although it is unlikely that the problem is in the phone.