Preserve nested errors

[Mimameid]

Apparently, field level errors are removed/not passed through, when they are nested and both parent AND child throw an error.

Here is an example:
https://codesandbox.io/s/elastic-hooks-7vqci?file=/src/App.js:430-597

As you can see, there is no associated error in the formState for the child. To get the error, one has to make sure, that there is no error thrown on the parent by the schema validation. For example, make the test function on the parent return true.
This can't be controlled by selective trigger calls.

We have a real world example, where we want to validate field level input and at the same time check, if the field levels intersect/overlap with their siblings. While the validation is possible with yup, we can't get both errors at the same time in the formState when using react-hook-form. The current workaround is to run the validation manually and use setError to set the second error (and clear it manually).

I'm wondering, why react-hook-form is designed like this. Literally removing the errors, in this case, returned by yup. And if this is an edge case, that is simply irrelevant?