#### Bug, feature request, or proposal: Bug #### What is the expected behavior? When an animation starts after the autocomplete dropdown has opened, the list should stick to the autocomplete input field. #### What is the current behavior? The list does not stick to the input field. #### What are the steps to reproduce? https://stackblitz.com/edit/angular-dgvxco  #### Which versions of Angular, Material, OS, TypeScript, browsers are affected? Angular 6.1.1 Material 6.4.2