Why do you make emphasis here on what language the programm is written ? As I told it is just an external program a Perl script interact with by IPC. As for me it is still to be proven that sshuttle is culprit. Well, there are some _signs_ that that it could be for sshuttle, but as I told you I am still not sure. And this why I chose adverb _probably_ in my statements.
I don't blame anybody I just look for help. ))) as for your workarounds , some of them I already tried, and probably will try others ... I just need some time to check, will let you know later