Viewport with animation on scroll throws error when resized

[kkartunov]

As per the title above.
Testing https://community-app.topcoder.com/examples/contentful/viewport/ZSLKiIGgYqmYg2WBuiNit
Everything works and observe animations are displayed until the browser is resized.

[SathyaJayabal]

@kkartunov verified
viewport.mov.zip

[SathyaJayabal]

verified on staging(develop)
viewport.mov 2.zip