This may seem hard to understand if you've never been in a maintainer's position, but "issues" carry a completely different meaning than "questions"

An issue feels, on the receiving end, like an accusation. The word says you did something wrong, and you've inconvenienced/harmed/let down someone, who is now waiting for you to make them whole again.

Answering a question gets you a thank you–you've done something altruistically,. You're a good person.

Fixing an issue? "Took long enough. Are you sure you're any good at this?"