Just noticed something interesting. I've been trying to figure out what is causing this, and noticed that for me when the tooltip goes to the incorrect spot it has the info from nUI on it twice. So it has the first set of health mana range, and then all the same info again underneath.
Hope this helps. Will continue to try and find out if it is caused by another mod or not. I can say that it seems random for me as to when it happens, and it doesn't happen often.
here's a screenshot of it
