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Bridge has been having problems keeping up with the the iPhones since the iPhone 7 was released. At first (older iOS) it would download JPEGs, but stop if it hit a MOV file.  It now (later iOS) does see files from an iPhone 7, at least on El Capitan—but while it can display the images, it starts the download and if it doesn't immediately crash, it pops up a warning that the phone must not be properly connected or the battery needs to be charged if any of the JPEG images have an MOV file associated with them. So it's definitely not handling newer phones or the newer iOS for phones. It could be that it totally doesn't recognize the images from 8 and 10 iPhones.

I know many problems were reported some time back, and I can only assume they'll get around to them when they don't have their hands full just trying to resurrect Bridge from the near death experience of a couple years ago. I think it's a shame Adobe hasn't made Bridge a top priority, but they at least decided to keep it going and try to (slowly) improve it—beginning with general performance issues and stability. PhotoDownloader, under the circumstances, is a lower priority because there are other options freely available.

While waiting for updates, Mac users can use the free with OS Image Capture.app to download their iPhone files to the computer. It works quite well, as one might imagine an Apple app would.