I think I see the same problem. I forward the data from dump1090 port 30005 to a VPS because I am on a IPv6 connection, but tried several methods to forward the port, i.e. via a SSH tunnel and a Wireguard VPN, either trough iptables NATing or forwarding with nc/socat. I also tried different dump1090 versions/forks.
With every method I see the connection dropping and reconnecting a while later, but couldn't find the issue.