Wrong letters! (Wrong font mapping)

well... When I have unicode fonts off and I type "ěščřžýáíé ĚŠČŘŽÝÁÍÉ" (the top of Czech keyboard layout) wrong symbols show! Look at the pictures (first one is unicode on, second unicode off). Yes I know that I play on a Spigot server, but this is unreleated, since it's a wrong mapping in the font file bug. I'm not playing with any resource packs!

Sorry, if it's a duplicate, I really tried to find, but I didn't find anything (and it only relates to the 1.6 bug, but it's not the same, this is a new one in 1.8.2)