Card Forms: Problem hiding fields.

When i have a condition that hide a field, my fields stay visible even the option "hide field" is on.

This usually happens when you have more than one condition affecting the same field  using show/hide conditions, please provide us the form where this happens as well as the field that presents the issue, we will be happy to have a look on it. 

https://www.jotform.com/help/401-Where-to-Find-My-Form-URL 

This is the form

https://form.jotformz.com/80666338625666

this happens for all fields that i have a show/hide condition.

I have cloned your form and I have been testing the form as per the conditions you have configured, although you seem to be handling the same fields with conditions based on different fields I can see they are still working as expected, please see this screen-cast about it: 

As you can see the fields will be showing up until a selection is made. May you please provide us an example about when this does not work? 

We will wait for your response. 

One example is my field "Qual a redução de barulho necessária?1" on his settings the option "Hide" is enabled, but when i test my form it is visible.

This happens for all the fields.

I checked your form to test it further and I was not able to replicate the issue. Here's my screen capture test:

Upon checking the screenshot you provided, it looks like you still not select an option to achieve the Show/Hide condition. Please select an option to test it.

If the issue still persists, please let us know. Thank you.