So basically, there is a spot on the map very far from the beginning where if you die on a slope the ghost will be reviving you in not an appropriate place, killing you before you even can get control over the guardian. No idea how did i get this, i suspect it is because of rotating platform nearby. This bug makes further progress impossible, preventing me from completing the quest. And because this is a seasonal exotic quest it is impossible to invite a friend to my game and save me, so the only option i have i to restart the whole thing from a scratch. This is so frustrating, please tell my ghost that reviving me on a slope is a bad idea. Thank you for reading this, i have included the videoproof in the post.