Why would the foreach change anything, its the same reference?

# ALL SAME
 dump(@$fldref[TXT]);


 foreach my $tmp (@$fldref[TXT]) {
    dump($tmp);
 }
 my ( $foobar ) = @$fldref[TXT];
 dump($foobar);
[download]

You probably want

 foreach my $tmp (@{ $fldref[TXT][0] }) {
    dump($tmp);
 }
[download]

When in doubt, show Data::Dumper output