A few points to keep in mind. The Central Bank of Russia stopped reporting economic indicators to anyone after the invasion, and no one is trading in Rubles anymore. Any data from Russia is suspect. No one outside of Russia has access to real data to know the real value of the Ruble or have any informed idea of the state of the Russian economy. Its all speculation not matter which authority puts their name to it.
the article cites “Bloomberg data” as their source
The sanctions are having a limited effect on Russia. Pretty much, it’s just the West boycotting Russia.