Im experiencing a problem, with controlling party members, it seems when i unchain them and play for a while i cant put them back together, im playin on Steam windows 10 if that matters. Restarting the game solves the problem sometimes, exiting to the main menu and loading also solves the problem. Same goes for spell book, when trying to drag a spell form one slot to another it disappears instead, when trying to drag spell from spell book nothing happens.

I put the mouse over a portrait and gently press and hold the portrait then try to drag the portrait, if its a a spell or item portrait it disappers, if its a character portrait i cant chain the portrait with other party members.
Its like the game stops registering that im HOLDING LMB... As i said before restarting the game solves the problem for a certain perioud of time..