Again: the maintainer does not say there is no bug. He says: please open a new issue, with a proper title and description for the actual underlying problem. Is that seriously too much to ask? Instead, the guy writes a whole blog post shitting on the project. Does anyone still wonder why people burn out on maintaining FOSS projects?
Not great behavior I agree, but what else is there to say other than "it does not match the spec at point 1.2.3"?
Open Source is not Free Support, the sooner this reality sets in (accelerated surely by AI spam) the sooner we get to the happy place.