Model : TL-ER6020

Hardware Version :

Firmware Version :

ISP :

I have a TL-ER6020 V2 with a static IP on WAN1 and a web server connected to the router via one of the LAN-ports. The web server get's assigned a reserved/permanent local IP-address from the routers DHCP.

I have opened up ports 80, 443 (Apache) and 22 (SSH) via the Transmission -> Virtual Servers page that points to the same internal ports on the server.

The home pages hosted on the server are reachable from anywhere in the world - except from the web server it self. The web server can reach any other site in the world, but not the once hosted on it self. When I ping a domain hosted on the server I get the routers public IP. If I try to "wget example.com" I get a time out error.
Traceroute makes one jump and reaches the domain.
The same result for both http and https.

I have two other TL-ER6020 V1 set up in the same way and those works like a charm.

The changes I made on all the routers:
Set up unique public static IP for WAN1.
Changed the routers local IP to 192.168.X.1 where X is different on each router.
Reserved local IP's to each web server connected to routers (one server per router).
Opened ports 80, 443 and 22 via Virtual Servers.

So, what's the difference between V1 and V2 that I missed?

Any idea where I went wrong, what I missed or what else I could do to get closer to an answer/resolution?