iknowwhatyoudownload.com IP visible when routing traffic down L2TP VPN

Hello! I have a problem with my RouterOS setup. I route traffic from my torrent box on my LAN (192.168.88.150) through L2TP VPN using this configuration:

/ip firewall mangle
add action=mark-routing chain=prerouting new-routing-mark=VPN passthrough=no \
src-address=192.168.88.150

/ip firewall nat
add action=masquerade chain=srcnat out-interface=VPN-L2TP

/ip route
add distance=1 gateway=VPN-L2TP routing-mark=VPN

(block outgoing traffic if the VPN is down)
/ip route
add dst-address=0.0.0.0/0 type=unreachable distance=2 routing-mark=vpn

I still can see most of my torrent downloads detected by iknowwhatyoudownload.com service.
I have a static IP from my ISP. Torrent box is Transmission on Linux.
Any ideas?

Forgot to mention, “Fasttrack Connection” rule IS DISABLED.