User blog comment:Rappy 4187/Technical Update: July 3, 2017/@comment-4970747-20170705020151/@comment-126761-20170705144829

The account creation log was moved off of Recent Changes a little while back - might you be thinking of that? It's still on Special:Log, in case anyone is wondering.

Apologies for any unexpected spam - as TK mentions, we've been running a script to rerun some renames that may not have completed properly (we identified a period a few weeks ago where the process was behaving oddly). It's still going, but hopefully will be done soon.