No last dinosaur bone, quest \"Test of Faith\" (Red Dead Redemption 2)

Shalom everyone!
Having already completed all the plot tasks, I took up the passage of the game by 100%. When collecting dinosaur bones from the guides, I ran into the problem that the last (thirtieth) bone for me was missing in its place. In most guides, she goes at number 7, on a rock near Lake Elysian.
Rebooted, slept, traveled fast, searched night and day - no bones, and that's it !!

Who faced similar? Any thoughts, comrades?

RockStars wrote to technical support, in response, just silence .. Perhaps because of the country of residence, for obvious reasons ..