I figured out what the problem is and just wanted to cross-link to the Rails and Puma issues I created:
https://github.com/rails/rails/issues/16878 https://github.com/puma/puma/issues/576 -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Core" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-core+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-core@googlegroups.com. Visit this group at http://groups.google.com/group/rubyonrails-core. For more options, visit https://groups.google.com/d/optout.
