"fi" ligature breaks Small Capitals

[RGB-es]

When using +smcp feature, fi ligatures are not properly managed as shown in the screenshot

[ladinando]

Other ligatures have the same problem:

¡Muchas gracias, José María Ribagorda y Octavio Pardo, por esta fantástica tipografía!

[rajeeshknambiar]

Just noticed the same issue when typesetting a document in XeTeX.