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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
EventPropagators.accumulateDirectDispatches,
      ReactControlledComponent.enqueueStateRestore,
      ReactControlledComponent.restoreStateIfNeeded,
      ReactDOMEventListener.dispatchEvent,
      EventPluginHub.runEventsInBatch,
    ],
  },
};
type RootOptions = {
  hydrate?: boolean,
};
ReactDOM.unstable_createRoot = function createRoot(
  container: DOMContainer,
  options?: RootOptions,
): ReactRoot {
  invariant(
    isValidContainer(container),
    'unstable_createRoot(...): Target container is not a DOM element.',
  );
  const hydrate = options != null && options.hydrate === true;
  return new ReactRoot(container, true, hydrate);
};
const foundDevTools = DOMRenderer.injectIntoDevTools({
  findFiberByHostInstance: ReactDOMComponentTree.getClosestInstanceFromNode,
  bundleType: __DEV__ ? 1 : 0,
  version: ReactVersion,
  rendererPackageName: 'react-dom',
});
if (__DEV__) {
  if (!foundDevTools && canUseDOM && window.top === window.self) {