Почему подставляет неправильный source ip при использовании policy-routing?

# Generated by iptables-save v1.6.0 on Fri Oct 20 03:34:12 2017
*nat
:PREROUTING ACCEPT [36600:10738573]
:INPUT ACCEPT [508:88888]
:OUTPUT ACCEPT [33236:7438108]
:POSTROUTING ACCEPT [33236:7438108]
COMMIT
# Completed on Fri Oct 20 03:34:12 2017
# Generated by iptables-save v1.6.0 on Fri Oct 20 03:34:12 2017
*mangle
:PREROUTING ACCEPT [1884558:1495540255]
:INPUT ACCEPT [1848511:1485003230]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [1744332:1246508180]
:POSTROUTING ACCEPT [1745048:1246623936]
-A OUTPUT -m owner --uid-owner 1001 -j MARK --set-xmark 0xaaa/0xffffffff
COMMIT
# Completed on Fri Oct 20 03:34:12 2017
# Generated by iptables-save v1.6.0 on Fri Oct 20 03:34:12 2017
*filter
:INPUT ACCEPT [4953268:5694985928]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [3324182:1484725175]
COMMIT
# Completed on Fri Oct 20 03:34:12 2017

iptables -t nat -A POSTROUTING -o enp2s0 -j MASQUERADE

# conntrack -L
udp      17 29 src=10.0.0.125 dst=8.8.8.8 sport=43424 dport=53 src=8.8.8.8 dst=192.168.0.125 sport=53 dport=43424 mark=0 use=1
udp      17 27 src=10.0.0.125 dst=8.8.8.8 sport=44706 dport=53 src=8.8.8.8 dst=192.168.0.125 sport=53 dport=44706 mark=0 use=1