Reporting: Traffic - not counting IPv6 traffic

[otih]

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Describe the bug

If a wget is performed with IPv4 the value of "Reporting: Traffic" Web Console for the device increases.
Performing the same over IPv6 the value is not increasing.

To Reproduce

Steps to reproduce the behavior:

1. wget https://proof.ovh.net/files/10Gb.dat -O /dev/null -4
2. see graph on "Reporting: Traffic" Web Console increasing
3. wget https://proof.ovh.net/files/10Gb.dat -O /dev/null -6
4. see graph on "Reporting: Traffic" Web Console not increasing

Expected behavior

IPv4 and IPv6 traffic should increase value of the graph

Describe alternatives you considered

n/a

Screenshots

n/a

Relevant log files

n/a

Additional context

First discovered within node_exporter:
opnsense/plugins#4566

Environment

Software version used and hardware type if relevant, e.g.:

OPNsense 25.7.a_36-amd64
FreeBSD 14.2-RELEASE-p1
OpenSSL 3.0.16

also tested on

OPNsense 25.7.a_124-amd64
FreeBSD 14.2-RELEASE-p2
OpenSSL 3.0.16

also tested on

OPNsense 25.1.2-amd64
FreeBSD 14.2-RELEASE-p2
OpenSSL 3.0.16

VirtIO (paravirtualized) NIC on proxmox Virtual Environment 8.3.4