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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

break;
              }
              node = node.return;
            }
            
            
            
            nextFiber = null;
          } else {
            
            nextFiber = fiber.child;
          }
          break;
        case ContextProvider:
          // Don't scan deeper if this is a matching provider
          nextFiber = fiber.type === workInProgress.type ? null : fiber.child;
          break;
        default:
          
          nextFiber = fiber.child;
          break;
      }
      if (nextFiber !== null) {
        
        nextFiber.return = fiber;
      } else {
        
        nextFiber = fiber;
        while (nextFiber !== null) {
          if (nextFiber === workInProgress) {