When the client fails to render a form, further calls to navigate() fail

[andres-urquieta]

1. navigate to a broken form (the example we found contains a multiple checkbox property with value:null instead of [])
2. try to navigate to any other form

the second form does not render.
the first form stays on "loading", there isn't any error message.
this also impacts other hypermedia instances.

https://jsfiddle.net/rvc11w4y/