How to add custom user fields to the front end registration page
You need to change your input tag from:

&lt;input id="Address" type="text" name="Address"
{%- if account is defined %} value="{{ account.Address}}"{% endif -%}&gt;


To:

&lt;input id="Address" type="text" name="fields[Address]"
{%- if account is defined %} value="{{ account.Address}}"{% endif -%}&gt;


All custom fields input types should have a name prefixed with fields[].