Account linking with Alexa app

Hi,

I am a newbie to posting here. I have a weird one and hope someone can help.

I have gone through the Alexa integration instructions without any issue, except when it comes to account linking with the Alexa app.

I see my skill in the dev section of the Alexa app. I attempt to link and am directed to to my HA login page. I login in without issue, but I am not then redirected back to the Alexa app, it just sits logged in on my HA instance.

I have tried on two Android devices and an iphone with the same result. I am using pfsense port forwarding 443 to 8123.

I have Googled it to death and most issues seem to be people having an error message, but i have nothing. Successful login, but no redirect back to the Alexa app to confirm succesful linking.

Hoping someone can help.

Thanks.

Andy