User blog comment:Rappy 4187/Technical Update: January 18, 2016/@comment-876022-20160119062600/@comment-126761-20160119112127

I'm not aware of any reason the 'Recent changes options' box would not be showing - I believe the tweak we made to it was to add a CSS class that triggers collapse functionality, and that was some time ago. (Of course, that was tweaked slightly today, as mentioned.)