Using Ver 1.9.3.66065 and a standard non-compact keyboard.
While the numbers in the numpad work (which didn’t happen in Gollup’s good old UFO Enemy Unknown and Defence) the numpad Enter key does not.
Only the Enter next to the letters work.
Try it wherever you can to input text, renaming soldiers, savegames etc.
This is mildly annoying so please fix it when you have time.