Default [Q] Crazy WLAN-Problem

My network is, my former network was (gw In former times is set this ip static. (In android 2.3 as global ip)...

My Android (actual CM11) use the actual network ( gw
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 tell, length 46
10:58:52.700440 ARP, Request who-has tell, 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 :/