@thomas-merz is complaining about the issue being open while it was fixed already in net-ssh, so I looked into both projects on top of it and it seems both are not really maintained anymore.
net-ssh-multi has also a very small PR open by @evgeni fixing the Rakefile for over one and a half year, which also indicates no-one is able to maintain it actively anymore.
So the logical question is how to proceed here? Is anyone willing and able to take over?
Yes, he pinged me in this issue, but it does not look like something to be solved with packaging.
Looking at our packaging net-ssh should be available already in newer versions including the fix and so I would expect it to be fixed or requiring code changes in net-ssh-multi and/or hammer-cli-foreman-ssh. As the issue still exists if understanding it correctly, I would say the second one is the case.