onClick fires on a button which is inside a disabled fieldset

[everdimension]

Do you want to request a feature or report a bug?

A bug

What is the current behavior?

An onClick handler is called on a button which is inside a disabled fieldset and has markup inside of it.

Reproduction

https://jsfiddle.net/everdimension/05p687q2/9/

What is the expected behavior?

The onClick handler should not be called, because the button is in a disabled state, even though it doesn't explicitly have a disabled attribute.

Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?

Chrome and Safari are affected. In Firefox there is no such bug.
As for React versions, I think all versions are affected.

NOTE

This is related to #8308

[everdimension]

Oh and I have also found #7711

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution.

[stale]

Closing this issue after a prolonged period of inactivity. If this issue is still present in the latest release, please create a new issue with up-to-date information. Thank you!