Hi @evmorov,
Just to give more context on our drive to post in the developer community - we wanted our answers to be accessible to all developers. More importantly, if it would benefit them. But apologies if I have not gotten back to this or any of our team, but rest assured that we don’t mean to not answer any of your posts.
You may be interested on voting and watching for this feature request.
As for adding a comment with an author via REST API, can you share with us the exact request that you used so I may test on my end? Please replace any username and password. If this is indeed an issue, we can file a bug for this.
Cheers,
Anne Calantog