a42c2dda5b
Summary: Discovered in https://fburl.com/h6eczhr2; the highlight didn't get removed correctly. This was from [this method](https://fburl.com/diffusion/twur28gt), which must be called on main thread to be executed completely. Reviewed By: jknoxville Differential Revision: D21629318 fbshipit-source-id: cfc52ac755a1ddfe92e675aac1a81066ce338bd7