There seems to be a bug in the Windows 10 slideshow app. If you have a folder with more than 30 pictures in it, and you view the first one, then click the slideshow button, it will only show 30 pictures and then loop back to the first picture. I am talking about the slideshow that you get when you click this button when viewing a picture:
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It does the same on several Windows 10 machines that I've tried. Does anyone know a fix? Or the name of another decent slideshow viewing program?