User blog comment:DaNASCAT/Technical Update: October 24, 2016/@comment-4970747-20161024220836/@comment-452-20161025021153

Guyus24, https://en.wikipedia.org/wiki/Help:Pipe_trick#Where_it_doesn.27t_work says that the Pipe trick has not worked in Galleries for at least 10 years, so it is unlikely to be fixed soon.

I can't find any mentions of it ever working, so I'm confused by your question about it working "again".