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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
return React.createElement('BR', null);
        }
      }
      let returnedValue;
      expect(() => {
        returnedValue = ReactDOMServer.renderToString(<Container />);
      }).toWarnDev(
        '<BR /> is using incorrect casing. ' +
          'Use PascalCase for React components, ' +
          'or lowercase for HTML elements.',
      );
      expect(returnedValue).not.toContain('</BR>');
    });
    it('should warn on upper case HTML tags, not SVG nor custom tags', () => {
      ReactTestUtils.renderIntoDocument(
        React.createElement('svg', null, React.createElement('PATH')),
      );
      ReactTestUtils.renderIntoDocument(React.createElement('CUSTOM-TAG'));
      expect(() =>
        ReactTestUtils.renderIntoDocument(React.createElement('IMG')),
      ).toWarnDev(
        '<IMG /> is using incorrect casing. ' +
          'Use PascalCase for React components, ' +
          'or lowercase for HTML elements.',
      );
    });
    it('should warn on props reserved for future use', () => {
      expect(() =>
        ReactTestUtils.renderIntoDocument(<div aria="hello" />),
      ).toWarnDev(