Stage category values not updating in the Business Process Flow

Hello,

I have updated Stage categories (Customization>Option Sets>Stage categories) to custom values and later on added one more value (saved and published the changes). This new value is not showing up in the drop down when trying to select it within the BPF. 

Do you have any idea of why is this happening? Any tips what can I do to bring this new value into the drop down?

Appreciate any tips.

Thanks.