I am doing some substantial refurbishment in my loft conversion, which basically involves moving a stud wall to make a bathroom smaller and a bedroom bigger.
I wonder what to do about this: the joist hanger seems to be doing very little by way of support.
On the other hand, it seems like it always had a twist in it, given the rakish angle at which the joist hanger has been nailed in. I am not quite sure how long the loft conversion has been there (perhaps 2012, perhaps 2008).
Should I leave it, or should I attempt to straighten it (e.g. using X bracing); semi-orthogonally, should I replace that joist hanger so it actually does something?
Edit: I pulled a bit more plasterboard off, at Freeman's suggestion, to see how far the moisture had spread. Looks to me like it hasn't spread sideways at all - the timber is dry and unstained just ~20cm to the left.
Update: I've done one joist hanger, and corrected the twist, taking Tim's advice in his answer below. Woop woop! I'll do the other JH when I lift the floor over its joist.