What is the extra SSL connection on AWS and bitnami to my IP address?

I have a server on AWS and bitnami redirecting SSL on port 443 to <some-port>. When I list processes listening on that port, most often I see only one line, and sometimes I see two, with the second one related to my IP and my ISP:

$ lsof -i :<some-port>
$ COMMAND     PID    USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
.node.bin <pid> bitnami   <2-digits>u  IPv6 <number>      0t0  TCP *:<some-port> (LISTEN)
.node.bin <pid> bitnami   <2-digits>u  IPv6 <number>      0t0  TCP ip-<some-ip>.<AWS-region>.compute.internal:8443->a<my-ip>.<my-ISP-domain>:<5-digits> (ESTABLISHED)

When I run the command immediately after, I only see the first line.

What is this second connection?