They do match.. Prior to my recent move to Vodafone my Beryl router was attached to a Virgin router in modem mode. It all worked fine. I have no clue what is going on now but I think a factory reset is imminent.
More woes.. Factory reset seemed to fix this, but I restored all my settings, samba, fixed ips, tailscale, adguard, etc and problems returned. It seems Adguard is the culprit. It never caused issues before. Does it get upgraded?