Fields validation not work properly

[denis-bushaev]

Seems like validating function not work
Playground: https://codesandbox.io/s/hopeful-shadow-qtnoiu?file=/src/App.js

[denis-bushaev]

CC @paolodamico

[paolodamico]

@mariusandra for context it looks like the validation is not propagating back to the view to render the error in the component