STDOUT is missing the lines in total - numbers and content.
Then, the problem is very likely to be Sig::SigAction breaking some builtin at an inconvenient time and corrupting perl internal state.

Anyway, running the program with strace may also give some hint.

In reply to Re^14: Net::OpenSSH loosing lines ins reply by salva
in thread Net::OpenSSH loosing lines ins reply by Andy16

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