Cannot assign keys CS SS SP and EN in the custom joy screen.

[stainlessdmc12]

When using custom joy.. I cannot assign certain keys to joysticks.
For example.. Roller Coaster.. I want to assign CS as jump ( a or B button ) but cannot.
When you click on it, to assign it just shows blank.

[stainlessdmc12]

Forgot to mention.. I`m using 0.0.86.12 RG350 version