opnsense insight wan ip in lan "top usage ports / sources"

[hydroaeolius]

I apologize if this is discussed elsewhere. I have searched and not found much. Any help is appreciated. Thanks in advance.

Simple setup: Cox modem => OPNsense on standalone hardware => switch => all my stuff

OPNsense 23.1.1_2-amd64

I enabled Netflow and Insight. Under Reporting | Insight | Totals | Lan | Top usage ports is my Cox Wan ip with significant (7%) traffic.

Is this normal/expected or do I have something...?