Hi @nkramer1
Thank you for reaching out to us!
Reading through our documentation on Keyword Replacement, after setting the mappings for the AUTH0_KEYWORD_REPLACE_MAPPINGS property, the keywords can be injected in the configuration files through either @ or # symbols, having a different effect as detailed in the doc. A couple of other useful articles/docs on this matter that could prove useful:
If in your testing you are observing a different behaviour than intended/described in our docs, please submit a Feature Request - our Product team monitors the queue of these requests and can forward the input to our internal teams. Others can vote on the submission and increase visibility over it.
Hope this helped!
Gerald