It's easy to reproduce if you move the 'with knobs' story on the top of the 'Button' group in `examples/cra-kitchen-sink/src/stories/index.js`: <details><summary>gif</summary> <img src="https://user-images.githubusercontent.com/6651625/29007386-e937c8ca-7b0a-11e7-9d1e-bc0769a0e318.gif"> </details> I'm not really sure, should we fix it on the side of knobs, tree, or both