The VPN statistics pages are specifically for OpenVPN only, no IPSec stats. Please change "VPN" to OpenVPN" to make crystal clear. As discussed in: https://community.ipfire.org/t/ipsec-vpn-traffic-statistics/2095 Thanks
@Stefan: Do you have a moment to take a look at this?
Patch has been sent to the develoment mailing list: https://patchwork.ipfire.org/patch/3467/
https://git.ipfire.org/?p=ipfire-2.x.git;a=commit;h=2c35344dda6b0b0d6b754c1e0ea6bed83cda8341
This has been fixed in Core Update 150. https://blog.ipfire.org/post/ipfire-2-25-core-update-150-released