youtube-dl fais to download "auto-generated" subtitles

[dportabella]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.03.24
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar bug reports including closed ones
• I've read bugs section in FAQ

Verbose log

$ youtube-dl --verbose --ignore-errors --write-description --write-info-json --write-annotations --write-all-thumbnails --all-subs --embed-subs --embed-thumbnail  "https://www.youtube.com/watch?v=9eVIY8rXS50&list=PLLRZnR2UeykqCkTFBuo7Vxa6zEV0jxMvN&index=2"
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'--verbose', u'--ignore-errors', u'--write-description', u'--write-info-json', u'--write-annotations', u'--write-all-thumbnails', u'--all-subs', u'--embed-subs', u'--embed-thumbnail', u'https://www.youtube.com/watch?v=9eVIY8rXS50&list=PLLRZnR2UeykqCkTFBuo7Vxa6zEV0jxMvN&index=2']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.03.24
[debug] Python version 2.7.16 (CPython) - Darwin-19.3.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 4.2.1, ffprobe 4.2.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube:playlist] Downloading playlist PLLRZnR2UeykqCkTFBuo7Vxa6zEV0jxMvN - add --no-playlist to just download video 9eVIY8rXS50
[youtube:playlist] PLLRZnR2UeykqCkTFBuo7Vxa6zEV0jxMvN: Downloading webpage
[download] Downloading playlist: Modulo 1 (Movimentação Básica)
[youtube:playlist] playlist Modulo 1 (Movimentação Básica): Downloading 22 videos
[download] Downloading video 1 of 22
[youtube] h8m7bz5weB0: Downloading webpage
WARNING: unable to download video subtitles: Unable to download XML: HTTP Error 404: Not Found (caused by HTTPError()); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

Description

The video has "auto-generated" subtitles, but youtube-dl does not manage to download them.
"auto-generated" subtitles means that youtube generated the subtitles itself using a speech recognizer.