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**Do you want to request a *feature* or report a *bug*?**
bug
**What is the current behavior?**
example: https://codesandbox.io/s/04393o3k6w
If the `LogProps` is child of `M.Provider`, and `M.Consumer` is used in its children.
When the `M.Provider` is updating, even if the `LogProps` is wrapped in a component that  never updates, it can still be triggered by the callback of `React.forwardRef`, and updates the `LogProps`.

**What is the expected behavior?**
the `LogProps` shouldn't update when the root component had updated, whether or not  `M.Consumer` is used in its children;

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

it's used react@16.3

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */
import type {HostConfig} from 'react-reconciler';
import type {ReactProviderType, ReactContext} from 'shared/ReactTypes';
import type {Fiber} from 'react-reconciler/src/ReactFiber';
import type {HostContext} from './ReactFiberHostContext';
import type {LegacyContext} from './ReactFiberContext';
import type {NewContext} from './ReactFiberNewContext';
import type {HydrationContext} from './ReactFiberHydrationContext';
import type {FiberRoot} from './ReactFiberRoot';
import type {ExpirationTime} from './ReactFiberExpirationTime';
import checkPropTypes from 'prop-types/checkPropTypes';
import {
  IndeterminateComponent,
  FunctionalComponent,
  ClassComponent,
  HostRoot,
  HostComponent,
  HostText,