I agree. And NVKs attitude has removed all trust I have in him, his product, and his receptiveness and willingness to fix issues. If he can't handle constructive feedback and issue reporting, then it's very possible for there to be existing bugs in the code that have been reported but ignored. Attitude is a great indicator of how a person/company will act in the future and whether that will be beneficial or detrimental.

I, like many, don't/can't look at every line of code and determine if there's no issue with it. As such, I depend on others with higher skillsets to do so and report any issues. Without a public issue tracker and with NVK dismissing and blocking people for reporting issues, there's effectively no way of knowing if there's an issue with their software. Look at the struggle it was just to get to the bottom of this nonreproducible issue! And this is a simple thing!