Glad to know it’s working now!!
Cluster setups tipicaly use the configuration in database feature to share the configuration amongst all the nodes, so that might be a reason why you’re seeing different values in the server config and in the config.json file, which would not be the source of truth anymore. Setting the value through env variables is a perfect long term solution, and you could use mmctl --local config set as well in case you need to modify the configuration again 