UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

Steps to reproduce the problem:
1. Open index.html in Chrome. It shows an implementation of the Intersection Observer API (https://wicg.github.io/IntersectionObserver/). The observer function will be called with a IntersectionObserverEntry which includes `isIntersecting` property. Whenever the target (
) get into the viewport the property isIntersecting is logged to the console.
2. Scroll up and down to see the value of isIntersecting in the console.

What is the expected behavior?
The value of the property should be true if it enters the viewport and false if it's leaving the viewport.

What went wrong?
Even when the callback is called properly on intersection the value of the property `isIntersecting` is only initially false but stays true afterwards.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 58.0.3029.110  Channel: stable
OS Version: OS X 10.12.0
Flash Version:
 

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