I asked this to get feedback on the community stance on whether the author is allowed to edit their (closed) question in such a way that it invalidates the existing answers.
Please read the related meta post in Worldbuilding.SE which led me to make this post.
Imagine this scenario: Alice asked a question. Bob read the question, and felt that it's too broad. However, he both answered and voted to close. The question was sent to the close review queue, where others reviewed it and it got closed. Then, Alice noticed that her question got closed, and edited the question to narrow the scope. In this process, Bob's answer became invalidated.
I agree that edits should not invalidate the existing answers. However, authors have full editing rights on their posts, and can make edits to salvage the question if it gets closed, so it gets pushed into the reopen review queue.
If Bob's answer become invalidated, I think he has brought it upon himself (unless he retracts the close vote). Even if Bob hasn't voted to close, he should know the risk for answering a question that is likely to be closed. If the question changed, he must make sure that his answer is still a valid answer to the updated question.
What does the community think of an author's edit to salvage the question, which then invalidates existing answer(s)?
Note: This question is more focused on how the community should handle the edit. Alice and Bob have done what they did, regardless of the breach of the etiquette.