My Android (actual CM11) use the actual network (192.168.0.127/24 gw 192.168.0.1).
For the first time it works, but after round about 30min the android tryied to reach the old gateway:
This happens only by connecting to some servers. Other works fine.
10:58:03.877391 ARP, Request who-has 172.17.19.1 tell 192.168.0.127, length 46
10:58:52.700440 ARP, Request who-has 172.17.19.1 tell 192.168.0.127, length 46
I looked in /data/misc/wifi but i found only correct entrys.
I have gapps installed but unchecked the recovery checkbox on initialisation. But these issue survive factory reset AND other devices... therefor i think it get old settings from google :/