Ctrl + Shift + F does NOT show font list, when font is selected with text tool and shortcut applied!

Ctrl + Shift + F does not show font list, when font is selected with text tool and shortcut applied!
Why is not responding ?

Interesting fact is that if you first assign shortcut of font list options to Ctrl+shift+F ,

and then secondly assign the same shortcut (Ctrl +Shift+F) to Font list.

Only then the shortcut works for font list.


Note : Remember to change Shortcut Key table to Text Editing

Is there any way to fix this Bug !?