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

**What is the current behavior?**

Since React@16.5 seems that `root` element has `onclick` event handler with noop function.
In ios Safari/Chrome browsers html element has gray overlay when tap on it.

The current behavior is that the whole `root` is blinking when we tap on it.

The simple example to reproduce:
https://codesandbox.io/s/wyo8rlj1zk
The issue is reproducing only in fullscreen mode https://wyo8rlj1zk.codesandbox.io/
(root container is steel blue)

I suppose changes came from here:
https://github.com/facebook/react/pull/11927
https://github.com/facebook/react/pull/11927/files

and the issue can be related with:
https://github.com/mui-org/material-ui/issues/11154
https://github.com/facebook/react/issues/12717

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
React 16.5
ios 11.3/12 Safari/Chrome
!hasNonRootReactChild || isRootRenderedBySomeReact,
      'render(...): Replacing React-rendered children with a new root ' +
        'component. If you intended to update the children of this node, ' +
        'you should instead have the existing children update their state ' +
        'and render the new components instead of calling ReactDOM.render.',
    );
    warningWithoutStack(
      container.nodeType !== ELEMENT_NODE ||
        !((container: any): Element).tagName ||
        ((container: any): Element).tagName.toUpperCase() !== 'BODY',
      'render(): Rendering components directly into document.body is ' +
        'discouraged, since its children are often manipulated by third-party ' +
        'scripts and browser extensions. This may lead to subtle ' +
        'reconciliation issues. Try rendering into a container element created ' +
        'for your app.',
    );
  };
  warnOnInvalidCallback = function(callback: mixed, callerName: string) {
    warningWithoutStack(
      callback === null || typeof callback === 'function',
      '%s(...): Expected the last optional `callback` argument to be a ' +
        'function. Instead received: %s.',
      callerName,
      callback,
    );
  };
}
ReactControlledComponent.setRestoreImplementation(restoreControlledState);
type DOMContainer =
  | (Element & {