there are news articles (I admit, of questionable origin) the claim he visited Russia yearly for the past decade. I do wonder if it the situation is a little more complex then he was a fugitive of the Russian Government
Further, there have been constant references, in articles from very reliable, reputable sources (see: CNN, NYT, FOX, etc.) since Russia's invasion into Ukraine about Russia's use of Telegram. I don't know that I could count the number of times I've seen phrases akin to, "based on conversations between Russian military commanders on Telegram," used as a source. The issue is that Russia's military essentially sucked at setting up their own communications channels, so they fell back to Telegram.