Confluence links aren't working in comment box

Have you checked Administration->Moderation->Filtering for the appropriate host?   It may be being filtered out

Yep. First thing I did. The Confluence links work fine everyplace but the comment box, which allows other links, just not Confluence. 

We would need the full url you are trying to test

I can say if I fake a url using the end format you specified it works fine for me on the latest 11.1

I can say if I fake a url using the end format you specified it works fine for me on the latest 11.1

I'll PM you.

I received the link and tried it in a blog comment, standard user, worked just fine for me.

I was worried the issue wouldn't replicate. OK. I'll try a few more things at this end and see  

If you don't find anything I would probably open a ticket,  it will require more information and investigation then would be appropriate here