I did not dig up for a detailed technical write up, but have a plenty media sites mentions (sorry for original Russian content):

Just news, mentioning this, back to 2016 https://lenta.ru/articles/2016/11/07/gpsoff/

Nice write up, also from 2016 https://meduza.io/feature/2016/10/19/teleportatsiya-iz-kreml...

News from Jan, 2018 https://snob.ru/news/156463

Nov, 2018 https://www.vedomosti.ru/politics/news/2018/11/12/786188-kre...

Hope that helps!

P.S. And yes, I personally see this behaviour near Kremlin. It's almost impossible to order a taxi nearby.

That does not happen all the time though. I would say geolocation works nicely pretty much all the time.

Not sure why it's not possible to order a taxi, since you're not supposed to provide your own coordinates but rather a point where you want to be picked up.

Wow, this is really happening. I'm surprised to hear this, very interesting, thanks!

You can also check [1]: "through a collaboration with researchers from The University of Texas at Austin, we expose the use of GPS spoofing in active Russian combat zones, particularly Syria, for airspace denial purposes. This is a capability scarcely reported in the public domain. Using data from a scientific sensor on the International Space Station (ISS), we are able to identify ongoing activity that poses significant threats to civilian airline GPS systems"

- works best on desktop though

[1] https://www.c4reports.org/aboveusonlystars

Well, yes. It's happening. That's why there's a report about it.