JIRA: Automatic notification for "all" changes to bugs ignores new comments that are added to bugs

I opened Issue No. DDC-864. After creating the bug, I clicked on "watch it".

The "Issue details" page for the issue is confirming it. "You are watching this issue. You will be notified of all changes. "

On 06/Nov/10 05:48 PM and on 06/Nov/10 05:49 PM two comments were added to the issue. I did not receive any notification.

I just noticed right now by polling the open issues I reported.

My email adress is correct (it's shown obfuscated with "dot" instead of "." by JIRA, but I think that's just a presentation thing).