I found it very confusing. The step are:
1) Select/write a broken example
2) Press "Quick Fix"
3) Press "Apply" or "Source"
4) Copy the fixed code
I was very confused between 2 and 3. I expected the new code to be shown intermediately.
Have you tried changing the code immediately and adding a back button?
Feature request: Is it possible to show the differences between the broken and fixed code, something like how github shows the changes in a PR?