When setting a tosca function on a non string sub property eg. integer, float, boolean, etc, of an input operation an error appears saying the type of the value does not match the sub property type

To reproduce:

• Add an interface operation to a VFC
• Add an input of complex type to interface operation with an integer or float sub property
• Add the VFC to a service
• Set a TOSCA function value on one of the integer or float sub properties in the complex type input
• When clicking save an error appears