xType Desktop mode mismatched charset

I set up UI.Vision to work with my phone through a Samsung Dex connection. All seems to be OK, but xType produces unmatching characters. For example, the number 0 types the small letter b. If I overlay Windows Notepad over Dex window, I get matching characters (0 is 0). If I type manually on my keyboard, I get matching characters in Dex (again, pressing 0 gives me 0).

Windows 10, the latest version of Samsung Dex, language preference is set up correctly and matches on PC and phone.

Any idea what could be going on and how to fix it?