Validation of
<textbox value="@bind(fx.businessTravel.endPlace) @validator('bv')" />
fails with error message 'There is no property endPlace in entity...'

Somehow the middle bean gets lost from ctx.getProperty().getProperty() in BeanValidator.validate(ValidationContext ctx) method.
ctx.getProperty().getBase().getFields() is showing the property name correctly as 'businessTravel.endPlace'