There is a rumour that several years ago some tools were dropped on purpose. Because astronaut did not liked to stay on orbit, and he/she wanted to return to Earth ahead of schedule.
They were trying at the time to deflect blame for what were clearly Russian manufacturing defects (especially in hindsight, given the number of defects and accidents Roscosmos have been responsible for lately).
1: https://en.wikipedia.org/wiki/Serena_Au%C3%B1%C3%B3n-Chancel...