Navigation nearly completely unusable on Moto G
On contrary to this answer, solution to my problem was exactly opposite --> I had to disable 4G networks / block my phone from connecting with them.

Settings > More > Mobile networks > Preferred network type > 3G.

In a moment after that my location become fast, permanent and accurate. No more problems with GPS fix, no troubles with finding location, extra fast location / route updates in Google Maps.

More information (on original solution -- disable 3G networks -- and problem itself) here:


https://android.stackexchange.com/a/184217/20449
https://forum.xda-developers.com/showthread.php?t=2198319
https://issuetracker.google.com/issues/37012926


The TopNTP application was mentioned in some sources as possible aid to similar problems.