rBc473b2ce8bdbf8fa42 improved the situation somewhat, but attribute search still crashes during animation playback, because the UI search data references stale memory. The proper solution is to allow the search to own data rather than just referencing it, but I would prefer not to do that for 3.0. In the meantime, just disable attribute search when animation is playing. Differential Revision: https://developer.blender.org/D13179