Put a textbox and RadRibbonBar on a form with enabled key map. Press Alt + 64. You should get "@" in the textbox. Instead, you get the key tips displayed.

Workaround:
public class MyRadRibbonBar : RadRibbonBar
{
    protected override ComponentInputBehavior CreateBehavior()
    {
        return new MyRibbonBarInputBehavior(this);
    }
 
    public override string ThemeClassName
    {
        get
        {
            return typeof(RadRibbonBar).FullName;
        }
        set
        {
        }
    }
}
 
class MyRibbonBarInputBehavior : RadRibbonBar.RibbonBarInputBehavior
{
    public MyRibbonBarInputBehavior(RadRibbonBar owner)
        : base(owner)
    {
    }
 
    protected override bool SetInternalKeyMapFocus()
    {
        if ((this.Owner as RadRibbonBar).ContainsFocus)
        {
            return base.SetInternalKeyMapFocus();
        }
 
        return false;
    }
}