I am an administrator of a protected WordPress blog. The blog is a protected site with login-only access to predefined users.
We are using WPDiscuz as an commenting platform.
Live update works perfectly while being actively viewing the post page (comments appear in real-time, notification bubble works, and new comments turn green).
But when I revisit a post after some time, WPDiscuz doesn't indicate which comments are new — no green highlight, and no number in the notification bubble.
I have tried to change the settings of wpDiscuz, but I didn't fix it.
How to fix it?

Some screenshots with my current settings are attached.

Thank you in advance !