Very unfortunate.
The fate of individual animals is not important. As long as we don't interfere in their lives and cause trouble to them and if the individuals still perish, it is absolutely fine. It is the populations, persistence of populations in their own eco-system that bothers. We have reportedly lost about 20% of the tiger habitat in the country during the last 5 years which public is seemingly unaware.
For Ranthambore forests, Machili tigress seems to be a goose that lays a golden egg. Neither the department nor the tour operators will easily allow the tigress to die in peace naturally.