[FLOW3-general] Fluid Subproperty error not shown in form

[Martin]

Dear List,

I have an Form to add an Extended Party and the Party will have a 
PersonNameObject to an Account. Its working.

All Validation errors are printed but the class f3-form-error are only 
shown for the properties of the extended PartyModel, for the Subproperty 
name.firstName there is no class added to the form.

Even I tried to have an custom validator written for my Model, but I 
don't get the error class shown in the from.

How can I make sure the errors are highlighted in the form?

Cheers

Martin