WordPress: Reply option to existing comments not visible.
This issue happened to me the other day, and all that I could find online was very old.
However, I did read something about nested comments, so I checked mine.
It had changed, apparently all on its own, as I know I didn’t change it. It was always set as 5, and active.
But, I had recently been testing a comments plugin, and I have a feeling that must have done something during the installation, or removal.
I doubt if it happens all the time, as two others sites that I also tested the same plugin on, did not have that issue.
Correct the “Enable Threaded Comments” section in Discussion Settings
- Enable threaded (nested) comments 5 levels deep
As image below
1.1 - 538,297