I think you mistakenly switched the roles there. You are not isolating a bug for the author. The author is using their software and is happy with its current state. It is you that is being hit by a supposed bug, and you are isolating it for yourself. Then you are expecting the author to do the additional work for you and handle your supposed fixes. Don’t get me wrong, you’re probably both helping each other in the best spirit of open source, but it’s not you who’s the ideal of generosity there.

Where does that bad feeling come from? Does it come from the fact that you feel like you're owed a response? Do you get the same feeling when you email strangers and they don't respond?

> Also if it's a real issue that you won't fix you should at least leave the issue open so other people know.

> IMO you can definitely be extremely grateful for someone's contribution and also think they are sort of rude, not incompatible views/feeling.

You're not entitled to gratitude. Assuming that people should & will run their own projects according to your values around courtesy is a little self-centred.

If you need the bug fixing and the maintainer isn't doing it fast enough, just fork it. This is the point of open source.