That's really interesting, since it certainly persists for me. I expected the whole console window to change output based on the strings, but I get the following output:

tmp.pl

#!perl
use strict;
use warnings;
use charnames ':full';
use Win32::Console;

binmode STDOUT, ':encoding(UTF-8)';

print "\N{INFINITY}\n";
[download]

tmp2.pl

#!perl
use strict;
use warnings;
use charnames ':full';

use Win32;
Win32::SetConsoleOutputCP(65001);
binmode STDOUT, ':encoding(UTF-8)';

print "\N{INFINITY}\n";
[download]

And the console output:

C:>perl q:\tmp.pl
дъз

C:>perl q:\tmp2.pl
∞

C:>perl q:\tmp.pl
∞

C:>chcp
Aktive Codepage: 850.

I'd expect the code page not to persist, and the output of CHCP does indicate that, but the terminal output / interpretation of the programs does indicate that after the first change to UTF-8, the output of subsequent programs is also interpreted as UTF-8 ...

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