Select and Download Multiple Attachments

So… until 2 weeks ago, my customers were able to multi-select using the shift key and then click download on the files pop-up frame and the selected files would sequentially download.  We’ve been doing this for 9 months.  Now, all of a sudden it doesn’t work.  We’ve changed settings on all browsers to allow multiple for the various domains.  I’ve tested multiple browsers, local, IIS configurations Local against our cloud configuration to no avail.  We use AWS to serve up our documents, we have negated AWS in testing scenarios, I find nothing in any setting on ACM… I am at a loss and about to lose customers because of this file transfer issue.  Anyone know what happened?