Hmmm… don’t think you can trigger .htaccess before your global proxypass.
However, what you want to get done with Lucee just the way ACF did, should work the same way with Lucee, because this is Apache related, and has nothing to do with the cfengine.
If you have access to apaches configuration files, you could try to deactivate that proxypass in the global file. Because you can’t use proxypass in your .htaccess you could try to get the job done as a URLRewirite to your proxy with a [p] proxy flag. See the link below:
https://httpd.apache.org/docs/2.4/de/rewrite/proxy.html
See also:
But I don’,t know how this would affect mod_cfml and added proxy headers.
However, I’d love to see the configuration of the former Apache global, virtualhost and .htaccess configuration files to see what/where the real difference is.