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

Bug

**What is the current behavior?**

when typing in a controlled input, the cursor always jumps to the end. This was an old issue that seems to have resurfaced.

[this code pen](https://codepen.io/gaearon/pen/VmmPgp?editors=0010) used in the docs [here](https://reactjs.org/docs/forms.html#controlled-components)  has the problem in all browsers as far as I have been able to test.

**What is the expected behavior?**

because we are using the state to update the component as soon as it's changed, the input element should be able to keep the cursor in the same place.

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

I'm at latest (16.8.2) and I tested on Chrome, FireFox, and Edge on Windows

as far as I know, this was working at some point, though I don't know how long ago. possibly even before "Fiber"


unstable_wrapCallback,
      unstable_getFirstCallbackNode,
      unstable_pauseExecution,
      unstable_continueExecution,
      unstable_getCurrentPriorityLevel,
    },
    SchedulerTracing: {
      __interactionsRef,
      __subscriberRef,
      unstable_clear,
      unstable_getCurrent,
      unstable_getThreadID,
      unstable_subscribe,
      unstable_trace,
      unstable_unsubscribe,
      unstable_wrap,
    },
  });
}
if (__DEV__) {
  Object.assign(ReactSharedInternals, {
    
    ReactDebugCurrentFrame,
    
    
    ReactComponentTreeHook: {},
  });
}
export default ReactSharedInternals;