I just only realized that they weren’t.
I was quite dissapointed that there were no comments for last 5 months. This site is not very popular but it do get few visitors a day and sometimes a comment. Now it is clear what happened.
I’ve tried to leave a comment myslef and got an error. After migration to STX Next I haven’t changed configuration for my MailHost. Every time comment was submitted it tried to send an email and failed. As a result feedback was not posted.
I’ve changed configuration and it is working now