If I had to guess, another issue could be permissions. If your drive has permissions set for its subfolders that interferes with your controller application that could cause issues as well. As a rule of thumb, I always copy the permissions from my original "Program Files" folder to any application folders on external drives, though this can be a bit complicated. Usually though the issue is permissions being too strict, which would likely not be the case here.
The characters do look around periodically, mostly when you aren't interacting with them for a bit. It's just a slight eye and head movement to a side and then it centers back on you. Not sure what they improved though.