I installed 6.0.6 core on joomla 3.9 running on a test environment in xampp with Apache/2.4.37 (Win32) OpenSSL/1.1.1a PHP/7.3.0 cache disabled.
I did a clean install. of the com and dutch language pack
Activated ccomments for two categories and for registered users.
Tested this and i can enter a comment, but when i press send the button store appears if i press that nothing happens.
When i then go to the backend i can see the message two times (for each button press). I can see it the status is published.
When i go back to the category (showing all articles in for that category) i can see that the article has two comments, but when i click on the article i see 0 comments.
When i edit the comment in the backend:
the content_id is the correct article_id
The parent id is -1 (no idea what this refers to)
the IP shows as ::1 (probably due to local setup, but changing to something real does not solve the issue)
Any idea what might be wrong?