Yes. Some of the nginx plus features are very small, and there's even 3rd party modules that add such features. This particular case seems like an outright bug, with a hack workaround. Would they take a patch to fix it?

It makes me think that they must be intentionally omitting features in order to make plus valuable. That seems rather cheesy. Obviously it's their code and right, but I think it shows how hard it is to profit off an open source program.