Precisely the OP.
More importantly it's sad and bad when a obvious negative comment is at the top of a front-page Show HN, that misrepresents and then deigns to provide recommendations against this nascent beautiful project that needs our support. Effectively shutting down the experience and enjoyment for incoming audience, and for the creator.
That is a very bad thing and should not be tolerated. Speak up against it.
I tested it with my phone and got similar results: I got only 9 out of the 21 QR codes to work. I don't know why you think such a finding should not be mentioned here.
OP is being respectful and merely points out an issue: the codes generated don’t work with some devices. If you want a code that works with everything, you can’t do too much customization.
It’s a very okay thing to point out and there isn’t much negativity in it. I agree that we should support projects like this, but being dismissive of real issues is not the way.