ProjeQtOr 8.5.4: Grouped Mails and "Not Receive Own Mails" Setting

I enabled the "Not Receive Own Mails" setting (value "Yes"), so I expected not to be notified about (e.g.) Ticket changes I trigger myself.

However, I still get notification mails for actions I've done myself.

The "Grouped Mails" setting is enabled with a delay interval of 60 seconds, because otherwise too many individual mails are being triggered. (Only as a side note, I just added three notes to a Ticket and modified those after adding as I forgot to make the links clickable in the notes etc., and this would have caused 14 emails to be triggered... Maybe I also should fine tune my triggers, but I was a bit surprised that for a "change" notification every added Note generates two mails actually - one with the message "Note added" and one with the message "Ticket modified". As a user, I would have expected that adding a note is one atomic operation which triggers one notification, not two. As a developer, I can understand that it technically might be two operations, but that's probably not what a user would expect.)


Are there any known (or intentional) limitations in the combination of grouped mail sending and the "Not Receive Own Mails" setting, or is there a different problem?