Fortunately, I had multiple saves, and could simply reload and ensure he used the trigger before the fight concluded, though it took a few tries to establish exactly where the problem occured. This didn't happen with Jan, who had skins and a trigger active through both with no problems. Fwiw, the install is a vanilla SoA/ToB version, running under core rules, which I had installed the Bioware patch on prior to isntalling ToB, no patches since.
Anyway, two questions emerge:
1) Has this happened to anyone else?
2) The ToB manual says there is a contingency/trigger button in the spellbook to access a screen where you can cancel triggers if you want - I couldn't find it, can anyone help locate it? Or is it a fiction?
Thanks in advance!