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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
render() {
          return <strong onclick="1">Child3</strong>;
        }
      }
      class Child4 extends React.Component {
        render() {
          return <div>Child4</div>;
        }
      }
      expect(() =>
        ReactDOMServer.renderToString(<Parent />, container),
      ).toWarnDev([
        'Invalid DOM property `class`. Did you mean `className`?\n    in span (at **)',
        'Invalid event handler property `onclick`. ' +
          'React events use the camelCase naming convention, for example `onClick`.' +
          '\n    in strong (at **)',
      ]);
    });
    it('should suggest property name if available', () => {
      expect(() =>
        ReactTestUtils.renderIntoDocument(
          React.createElement('label', {for: 'test'}),
        ),
      ).toWarnDev(
        'Warning: Invalid DOM property `for`. Did you mean `htmlFor`?\n    in label',
      );
      expect(() =>