Ridiculous. Sabotage by whom? By an Astronaut? On their shared living space? To what possible purpose? Damage the structure that was jointly built for 200+ billion dollars? What does this accomplish except for endangering their own lives?
Much more likely to just be an unreported (due to fear of repercussions) manufacturing/operational accident
It would serve to undermine the credibility of current glorious system currently in place in Russia, whatever they're calling it at the moment. (Please. I'm being ironic.)