I could be wrong, but I think the only thing that would corrupt a terminal would be control codes, and specifically the escape character \e. Any utility meant to dump protocol traffic to a terminal should always escape the control codes. Before reporting it, see if you can find the line that does the printing, and add this:

$str =~ /([\0-\x09\x0B\x1F])/sprintf("\\x%02X", ord $1)/ge;
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and see if it stops corrupting your terminal. Then you could submit a pull request instead of a bug report :-)