To be hones, I'm not sure what info do you need.
You are probably right about the old cache, maybe this is the issue.
The other thing I suppose to be a difference between the current setup and the new one is the path where all data and config is stored. As I said my old wiki is deployed in an LXC container which is running Apache host based virtual host and the docroot of it is /home/w.d3v.ma3x.org, all the files are there.
On my new Kubernetes based install I use LinuxServer.io image and I do only have /config volume as persistent storage, as mentioned in the docs: https://docs.linuxserver.io/images/docker-dokuwiki/