Openssh on i686 1.4-release closes connection and rejects any attempt to login when built against linux-headers-4.19.
Gentoo bug report: https://bugs.gentoo.org/737604
To resolve on funtoo
Unmask/emerge linux-headers-5.7
linux-headers-5.7.ebuild add * to keywords="*" to umask.
emerge -av =sys-kernel/linux-headers-5.7
Rebuild openssh:
emerge -av openssh