Interesting. I see. Maybe expanding its controller that should be this one:

Note that at least for Phame, http://phorge.localhost/J1 seems to always redirect to http://phorge.localhost/phame/post/view/1/blogpost/ instead of keeping the monogram in the URI.
So the baseURI is already wrong (not being http://phorge.localhost/ only) before concatenating the $ref (monogram and anchor).
As an ugly workardound, could probably make "Quote Comment" work by calling getObjectNamePrefix() in PhamePostRemarkupRule and LegalpadDocumentRemarkupRule and then use them in a preg_match to remove the monogram from the $ref but function is protected and... still ugly.

I'm 99% sure that this only affects Phame and Legalpad. I tested in Audit, Maniphest, Paste, Pholio and Files without issues.