Just because the rubble went up doesn't mean Russia's economy is doing fine.
The rubble isn't going up because the economy is doing well. Prices for oil, gas, and wheat just soared and the state instituted drastic measures to regulate the currency. While an industrial nation doesn't just collapse, most industries outside of resource extraction are currently crumbling. Some of the ways the Russian state has propped up the rubble will ruin any interest for international actors to invest in Russia and even domestically this will have severe long lasting consequences.
https://www.cbsnews.com/news/russia-ukraine-ruble-currency-russian-economy-2022/
Forcing domestic companies to convert western currencies into rubble and using the state's reserve in foreign currency to push the Rubel can only be temporary measures with big long term costs attached to them.
The rise in oil and gas of course was a good compensation for the loss in export volume to the west, but this also will only last until other oil and gas producing nations ramp up productions and the alternative supply lines are ready. This is of course also leading to severe long term consequences as many nations that are currently switching away from Russian resources are likely not to buy in the same quantities from Russia in the future.
https://www.businessinsider.in/stock-market/news/saudi-arabia-could-ramp-up-oil-production-if-sanctions-force-russia-to-slash-crude-output-report-says/articleshow/91967132.cms
Considering the Russian state budget is extremely dependant on their mineral extraction tax (roughly making up 43% of their federal budget), any loss in that market will cripple the federal budget.
https://www.nalog.gov.ru/eng/tax_statistics/rbr/
