Hi,

I found the following bug. When you activate an index, the posts created before that get synced, but don’t receive a post_meta field called algolia_posts_{index}_records_count. It turns out that that meta is used to delete the post from the index. This causes orphaned posts in the algolia index which leads to confusing 404 search results. I created a video with a basic wordpress site demonstrating the issue.

https://www.dropbox.com/s/d2mm7vy3ei33g1x/algolia_reindex_bug.mov?dl=0