This is happening only if "Ethernet Lan Option Rom" is checked (active) in BIOS (ThinkPad X230). So there is the reason. After disabled this option IP is not lost after first renew.
This is happening only if "Ethernet Lan Option Rom" is checked (active) in BIOS (ThinkPad X230). So there is the reason. After disabled this option IP is not lost after first renew.