A few weeks ago we switched off the paid search service we were using and started using the default Xenforo search. I hate the default Xenforo search, so I am moving us to ElasticSearch which is a lot faster and more robust. In order to make this move the search index needs to be cleared and reindexed. So I am running that now, got about 3 million more posts to index, so less than an hour. Because of the reindex the searches you run might be incomplete. But will be much better when they are done. Thanks for your patience.