Additional note. Some of these behaviors in access mode maybe "AI" related. That is initially there did not seem to be a problem with a conflicting DHCP running on the Deco X20. But after 5+ minutes...

I have a 3 node Deco X20 WiFi mesh system. Access point mode still is not acting as simple media bridge to existing wired network behind another firewall-router. I would like a proper access point...