In this release, an unexpected issue was fixed with Content-Length header. It turns out that between requests the constant I store the default headers was mutated which leads to Rack::Lint throwing an exception that content length differs (body vs header).
So now it should be fixed. Happy metrics, everyone 🎉 💙
Special thanks to @ThisIsMissEm for bringing this issue to the table 🐞
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ThisIsMissEm