The Sharpshooter feat gives Astarion +10 damage with the "All in" option turned on. But after he equips and unequips his torch, the +10 damage isn't shown on the action anymore. Toggling and untoggling the "All in" option doesn't get the +10 damage back. I have to reload a saved game to get it back, and have to avoid having Astarion use a torch from now on. Is this a bug? Here is my video capture to see it in action:
Today's Patch 2 seems to have fixed this, at least partially. Equipping a torch still causes incorrect damage to be shown on the action bar. But if I try to use that attack and cancel it, the correct damage is shown again on the action bar. Equip the torch again and the problem occurs again. Using and canceling the attack fixes it again. So right now it is just a visual bug.