Bumping because I have same issue and others, too: see here
DNS rebinding and firewalls/NAT should not affect your local LAN unless you are an office with zerotrust / segmented networks or use a VPN.
Easy check:
can you open the server dashboard and check what happens when you (with another computer/browser) go to
https://[your server’s LAN IP]:32400/web
does the connection show as “remote” or “local” ?
( left is remote, right is local )
