It is possible it’s related to NGINX ?
I mean, maybe NGINX cut or hold the connection, or cache it, …
n8n suggest having this configuration
server {
listen 443 ssl;
listen [::]:443 ssl;
}
server_name cloud.example.com;
location / {
proxy_pass http://localhost:5678;
proxy_set_header Connection '';
proxy_http_version 1.1;
chunked_transfer_encoding off;
proxy_buffering off;
proxy_cache off;
}