Image thumbnails no longer work, now just icons. Photoshop 15

[#1]

Where there used to be image thumbnails for tiff files saved from Photoshop Elements 15, they are now only icons with "tiff" written on it. Viewer options are set to "show thumbnail" in Preferences, but it doesn't work. Computer is a Mac OSX 10.11.6. Any help on resolving this would be appreciated.

[#2]

Hi,

Can you provide some sample images by attaching them here or privately messaging them to me?

Thanks!

[#3]

Thanks for the reply. I will get some of the images together and send them soon. I got tied up with some other work.

[#4]

Here is one of the images which only show an icon instead of a thumbnail. 

[#5]

No problem to open this file on Windows, on different Elements versions as well as other common editors.

If you rename the file to avoid having two '.' in the file name, would it work better?

[#6]

Here with pse 15 running on Mac OS X 10.11.6 El Capitan shows the Image in the File>Open dialog.

Do you see the thumbnail in Finder itself or it's just not showing in the pse 15 Open dialog?