Java Spring Webflux - IP in access log

Question

Small question regarding how to interpret the IP of an access log of a Spring WebFlux application please.

I have a very simple Spring WebFlux Application, with access log enabled, I can see the log, happy.

This application was built for only one client. Meaning, I am sure, at any time, there is one and only one client application calling in for sure.

Moreover, I know as a fact the client application is also unique. It is one client application that rarely restarts, there is only one instance of it, deployed in a fix physical datacenter, inside one physical hardware server. TLDR, there is only one client.

Yet, in my access log, each time this unique client calls in, I see something like:

INFO [myservice,,] 10 --- [or-http-epoll-4] reactor.netty.http.server.AccessLog      : aa.1aa.1aa.aa - - "POST /myapi HTTP/1.1" 200 563 382
INFO [myservice,,] 10 --- [or-http-epoll-2] reactor.netty.http.server.AccessLog      : bb.2bb.2bb.bb - - "POST /myapi HTTP/1.1" 200 563 372

And this is confusing me, as in why would I see multiple IP in this log?

Thank you