We previously imported
core.js with global polyfill pollution; our polyfills could have conflicted with an integrator’s, causing their search bar integration to not function. We have updated to use the “pure” version that does not affect the global namespace.
Note: Earlier versions of the theme were relying on global polyfills. In order for your site to work correctly in IE11 with 1.6, you will need to be on 1.11.0 of the Theme (or later). Alternatively, you can shadow the files here, bundle: Add polyfills and plugins from SDK by creotutar · Pull Request #278 · yext/answers-hitchhiker-theme · GitHub