Regression on payments after upgrade from 3.0.1 to 3.1.3

I recently upgrade Redsys extension to 3.1.3 and payments for event registrations stop working. I get "No se puede realizar la operación. Error en datos enviados. Contacte con su comercio" erro message in the Redsys side.

If I revert to 3.0.1 payments works well again.