network manager emerged with dhcpcd use flag refuses to connect to networks (no wireless connection and infinite connect attempt loop for wired) unless nm-applet is used to specify "ignore" in ipv6 settings for the network
Thank you for the report. Please recompile and *attach* the logfiles, https://wiki.gentoo.org/wiki/Attach_the_logs_to_the_bug_ticket and reopen this ticket (Status:unconfirmed).