I'm playing Sebille main with Lohse companion (lone wolf). At some point around the time I performed the Ascendancy ritual (and certainly afterwards), Sebille became stuck out of combat. I cannot force her to take damage, or enter combat with her.
It resembles what I'm reading about the early-access companion bug where you could wind up with companions stuck in this state due to status flags not resetting.
I'm pretty sure this save is bricked. It's a disappointment, but I do love this game, so I'll keep on trucking with a new save file.