After PC wakeup we got +1 zombie ps ax | grep dhcp | grep Z 3554 ? Z 0:00 [dhcpcd] <defunct> 7621 ? Z 0:00 [dhcpcd] <defunct> 7991 ? Z 0:00 [dhcpcd] <defunct> 17847 ? Z 0:00 [dhcpcd] <defunct> Same bug was patched, but seems reanimated in gentoo https://github.com/NetworkConfiguration/dhcpcd/issues/57
Created attachment 902994 [details, diff] proposed patch https://gitlab.freedesktop.org/rsmarples/NetworkManager/-/commit/9cc2591fe871b29ce9a743dfb2cd189cb1580bde