Home Assistant Remote Access Problem

I have Hassio 0.63.1
I have configured the remote access without SSL with the port forwarding 8123 >> 8123
I can access without problems from the mobile when it is connected by 3G / 4G, but if it is connected to wifi networks (outside my LAN) or from computers outside my LAN I do not have access.
But from mobile without problem through the APP or the browser.
I have also tried with SSL access configured duckdns + encrypt and port forwarding of 443, but the problem is the same.
It stays loading the web until it jumps “error in waiting time”
What can happen?

No solution to the problem?
The problem is the same after several updates and different tests.
External connection by 3G / 4G ok, but by another LAN impossible

The problem is that your router doesn’t support NAT loopback (aka NAT reflection or Hairpin NAT).

The router of the local network of the Home Assistant?, or of the external LAN?

Your local network, the router that connects you to your ISP