REST API 2.0 regression: "repositories/{owner}/{repo_slug}/commit/{revision}/comments" stopped working

It stopped working a few days ago.

For example "https://bitbucket.org/api/2.0/repositories/tutorials/markdowndemo/commit/d37ea908b05297d617be0d48444ea1e39b3ac02d/comments" returns 404 error with:

{
"error": {
"message": "d37ea908b05297d617be0d48444ea1e39b3ac02d/comments",
"detail": null
}
}