I found a way through it ! Affter i tell Sassane to go invoke the demon, i keep hiting the A button from the controler like a crazy et the same time keep move the stick in all directions, and it finnaly went through the invocation.
This doesn't sound very plausible. However, having not played it since Buad's Storage's glitch, I'm far from Sassan, so I can't test this. I can only greet it with scepticism.
