Masterbar: cannot log out of WordPress.com twice

[jeherve]

Steps to reproduce the issue

1. Go to Jetpack > Settings > Writing
2. Enable the WordPress.com Toolbar feature.
3. Go to WordPress.com and make sure you are logged in.
4. Back to wp-admin, click on your Gravatar and click sign out to log out of your site. It should also log you out of your WordPress.com account.
5. Log back in to the site and to WordPress.com.
6. Attemt to sign out again using Jetpack Masterbar's Sign out button
7. You will not be signed out of WordPress.com.

This appears to be an issue in Jetpack since at least version 6.8.

Kudos @brbrr for finding this!

[stale]

This issue has been marked as stale. This happened because:

• It has been inactive in the past 6 months.
• It hasn’t been labeled `[Pri] Blocker`, `[Pri] High`.

No further action is needed. But it's worth checking if this ticket has clear reproduction steps and it is still reproducible. Feel free to close this issue if you think it's not valid anymore — if you do, please add a brief explanation.