Reports based on shared datasets are functionning extremely slowly

Hello everyone!

I have several shared datasets published in Power BI service and a lot of reports based on these datasets. Last Friday I noticed that all these reports are functionning extremely slowly - every page is downloading for 5-10 minutes or even more -  shows no data. All other reports based on other sources are fucntionning well.

Moreover in desktop reports version I still have the same problem - the data from shared datasets is downloading slowly, too.

I haven't made any changes in datasets or reports recently. It looks like there is any Microsoft update that I haven't noticed.

Could you suggest me where to look for udates or how to handle this issue? I still can't figure out - whether it is my personal problem or it is any global Microsoft Power BI issue...