Access Plex reverse proxy from WAN on LAN

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I am running some services on my Unraid server (which is on LAN) all services that I want to access is accessible except for Plex while I am on LAN.
On LAN trying to access the reverse proxy "plex.mydomain.com" I get the pfsense DNS rebinding error.
But when accessing from my VLAN or from WAN all is working flawlessly.

I have set it like my other services in host overrides, and all other services works fine from LAN too. Just Plex got the DNS rebinding issue. Anyone know what could help?