I'm using Affinity Publisher and my operating system is Windows 10. I have installed the OpenType version. I'm not getting the uppercase as you are @lagarto, my just shows all the characters in lowercase. I'm not having any problems with any of the special characters, it is just uppercase. I was using this font in Adobe InDesign before I switched to Affinity, I use the font for a print I sell so if uppercase letters are requested I am having to do it in InDesign, which is not ideal as I'm having to pay for it just for this reason. One other thing, when I export to pdf in Affinity I have to convert to curves beforehand or the characters change to a jumble of other characters, not sure if this has anything to do with why this font isn't working correctly for me.