It works for me. Show your code, please. Mine is the following:
{
open(my $fh, '>:raw', 'file') or die("open>: $!\n");
print $fh ("abc\x{0D}\x{0A}de\x{0A}fg\x{0D}\x{0A}");
# [------5------][---------7----------]
# [------5------][---3--][------4-----]
}
{
open(my $fh, '<:raw', 'file') or die("open<: $!\n");
local $/ = "\x0D\x0A";
print length, "\n" while <$fh>;
}
outputs
5
7
If you remove the assignment to $/, the output is
5
3
4
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