Chrome / Gmail freezes system when downloading files
I use a new iMac. When I download a file via Chrome - from a website, or Gmail -, the download is successful, however, the whole system is freezing, unresponsive. Nothing works, only the Power button "shutdown". I searched the internet, as I see it is not a unique issue... Please advise what to do. Thanks
iMac 27″, macOS 10.15