@viktor_g Thank you. You helped me so much

@viktor_g ipv4

This magically resolved itself, by adding both 443 and port 444 on the SYNC network,

Thank you, you are correct the error was this incorrect entry and it was causing all the other issues.

Fixed it and everything is now working as it should

Thank you for your time and patience
cjb

@oguruma
Disabling transparent-client-ip on haproxy would probably make it work.?.

Or make haproxy use a different port on the webserver for handling its requests. (Configure the webserver to listen on 2 ports, one for direct requests :443, the other for example :1443 for haproxy's transparent requests.)