UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.162 Safari/537.36

Steps to reproduce the problem:
1. There is button in the front-end to download multiple files, the download function looks like this

function downloadUrls(urls) {
            urls.forEach(function (url) {
                if (url != null) {
                    var link = document.createElement('a');
                    document.body.appendChild(link);
                    link.href = url;
                    link.download = '';
                    //link.setAttribute('download', fileName);
                    link.dispatchEvent(new MouseEvent('click'));
                }
            })
The param "urls" is an array of file links.
2. After click the button, only the last file link in the "urls" array get downloaded instead of all the links in the array.
3. Did clicked "Allow" when "Allow this site to download multiple files" dialog pops out in previous version of Chrome(64 and before), can still see the site is in Chrome settings -> Content settings -> Automatic downloads -> Allow list, tried to remove and re-add it into the allow list, and toggle the "Ask when a site tries to download files automatically after the first file (recommended)" option, nothing works. 

What is the expected behavior?
Multiple files start downloading simultaneously.

What went wrong?
Only one file start downloading and gets downloaded.

Did this work before? Yes 64

Chrome version: 65.0.3325.162  Channel: stable
OS Version: 10.0
Flash Version: 

This issue only happens in the latest Chrome 65, I tried on all my windows computers. Before updates, this works as expected. After updates to 65, all have the same issue here.