I do not know Linux that well, but I can tell you changing the network settings in unraid is almost guaranteed to cause the system not to boot. Also seems to sometimes cause other various issues, like the webui going from dark to light without me changing the setting.
In any case, I'm using eth0 now with bonding disabled. Should I start a thread in docker containers about why I still can't access nextcloud docker? It sure feels like a network issue.