That it's not reproducable is due to my own terrible incompetence. :-) I had tried to modify your example for the phone/fax section in such a way, that it would put these pairs into %hash:

{"Street name" => "Sample Street",
"House number" => "123",
"ZIP Code" => "45678",
"City name" => "Randomcity"}
[download]

With all the things I had tried, I only managed to get the string "Sample Street 12345678 Randomcity" into one of the fields, and the other one then was left empty, like:

{"Sample Street 12345678 Randomcity" => ""}
[download]

I guess my main mistake was to assume, that it's necessary to start out from the $dom all over again, for each and every HTML element. The crazy idea I had was to somehow grab "Sample Street 123" into one variable (starting from the "address" element), and "45678 Randomcity" into another, by somehow targeting, and starting from, the first <br/> element after the "address" element.

I'm still not sure why my <br/> always got stripped away, maybe because of my misunderstanding of how the "map" works:

use warnings;
use strict;
use Mojo::DOM;
use Mojo::Util qw/trim/;
use Data::Dump;

my $dom = Mojo::DOM->new(<<'HTML');
  <div class="address">
          <div class="icon"></div>
          <address>
            Sample Street 123<br/>45678 Randomcity          </address>
        </div>
HTML

my %hash_address = @{ $dom->find('address')->map(sub {
return ( trim($_->text), "This_is_the_address_content" ) }) };
dd \%hash_address;

__END__

{
  "Sample Street 12345678 Randomcity" => "This_is_the_address_content"
+,
}
[download]

Your solution is very elegant indeed, many thanks! :-)