ん (n) symbol doesn't display correctly

today Imade new japanese save file. and i noticed that ん (n) symbol doesn't show up correctly. also Miis don't pronounce it. does anyone had that issue? and how do you fix it?

as showed in screenshot, her name supposed to be リンーちゅん (rin-chan) but instead it's リンーちゅ[?](rin-cha[?])

today Imade new japanese save file. and i noticed that ん (n) symbol doesn't show up correctly. also Miis don't pronounce it. does anyone had that issue? and how do you fix it?

as showed in screenshot, her name supposed to be リンーちゅん (rin-chan) but instead it's リンーちゅ[?](rin-cha[?])