It is how that spell works and according to Larians own description, it is intended to make NPCs hostile,when they realise,what happened.
So if you didn't had that before, it was a bug.
So you're telling me in 2 playthroughs, over 200h and using Friends literally EVERY SINGLE TIME it was available, it was bugged the entire time?
Because it has NEVER behaved like this for me.
I tell you, what should be. On Tactician, this spell should work as described. However, as Niara pointed out, you might have had luck, that you didn't loose enough friendship with npcs, that they did turn hostile. Or it was a bug in your game. I can't tell you, what is wrong on your side, I can only tell you, what is suppose to be happening.
