The MoD of Russia has published an new map of their area of responsibility on December 13, 2020.
It shows an extension in the South of Nagorno Karabakh. I present here the maps of Dec. 11 and Dec. 13, so you can see the change:

This is in response to incidents on Saturday Dec. 12 in the area there, when Azeris and Armenians exchanged fire and Azeris moved into the villages Khin Talgar and Khzaberd. The incident is said to have caused several deaths among Azeri and Armenian soldiers, also rumour has it that Turkish special forces also took part in the incident. Prime minister Pashinyan of Armenia made this claim, but it is unconfirmed.
The situation is now calm again and both villages have passed under control of Russian peacekeepers.