Cryptocurrencies stopped updating in the Stocks App

I've been using the Stocks app for checking prices of a number of cryptocurrencies, e.g. Bitcoin, Ethereum, etc. However, the prices stopped updating 1-2 days ago. Their historical movement (the graphic) doesn't show for them. Prices seem to update for other types of stocks, say companies, S&P500, etc. It is the cryptocurrency prices that stopped working. I see that on all my devices (MacBook, iPhone, Watch) and on my friends' devices too. Any idea what the reason is and when a fix is expected?