Won’t backup video on cellular.

This is a great way to backup photos I guess. However, under Settings -> Auto-Save Options, There is and option for Wi-Fi Only and Wi-Fi + Cellular. When Wi-Fi + Cellular is selected, it still will not back up photos on cellular and says “To protect your data plan, videos will be saved using Wi-Fi only." I have a true unlimited data plan, and I would like to back up everything using cellular. Some Wi-Fi networks are slower than LTE so I’d rather use that.

Station86 about Amazon Photos: Photo & Video