Keepnote not taking few letters and numbers

[Cybervish133]

Few keys reflected are not being reflected in my notes. I tried to type a to z and 0 to 9 and only following keys were showed in my keepnote.
adeghimnoqstuxy4

[IceWotor]

mine doesn't let me type x, instead of it entering the letter x, it undoes thing. I don't know how to unbind "undo" to x