Sekhema/Zahrok Error

Hi,

it´s now the third time in a sekhema run that i got thrown out of the zahrok bossfight midway after the first phase of the points u have to run on.
first the game freezes and than it crashes.
after i start the game it loads me into the sekhema entrance and there is no run that i can continue, i dont understand why it´s not saving the progress, very frustrating espacially when u got a good run with lots of stuff and a relik that is wasted...

and for poor guys like me its like a mood killer when this happens more then once, i am so frustrated...