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

**What is the current behavior?**
In mobile Safari, DOM events originating from elements rendered through a Portal do **not** bubble (propagate) up the React component tree.

**If the current behavior is a bug, please provide the steps to reproduce....**
Please see the following JSFiddle: https://jsfiddle.net/zebulonj/wf7orwan/

In this JSFiddle, the expected behavior (seen in a desktop browser) is that clicking on the portal content (appearing as a modal, including backdrop) should toggle to the "On" or "Off" indicator rendered in the main content. However, in mobile Safari (iOS 11.1.1), the click events do not propagate.


**What is the expected behavior?**
Click events should propagate up the React component tree.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
Affected: React 16.2
iOS 11.1.1

if (didWarnInvalidHydration) {
      return;
    }
    didWarnInvalidHydration = true;
    warningWithoutStack(
      false,
      'Expected server HTML to contain a matching text node for "%s" in <%s>.',
      text,
      parentNode.nodeName.toLowerCase(),
    );
  }
}
export function restoreControlledState(
  domElement: Element,
  tag: string,
  props: Object,
): void {
  switch (tag) {
    case 'input':
      ReactDOMFiberInput.restoreControlledState(domElement, props);
      return;
    case 'textarea':
      ReactDOMFiberTextarea.restoreControlledState(domElement, props);
      return;
    case 'select':
      ReactDOMFiberSelect.restoreControlledState(domElement, props);
      return;
  }
}