Not sure if this is 100% related but I'm also such with 24.7.5_3 because this is the last version that works with IPv6 for me. Somehow I never get a correct IPv6 gateway with > 24.7.5_3. I suspect it is related to some changes in dhcp6c since a newer version was released with 24.7.6. I didn't have time to look closer at the issue so far unfortunately.