If you open an adjustment section (eg curves), and move to the next image while within edit mode (single or n-up), the adjustment will return to default state (all sections closed).
I think it would be helpful if the state of the adjustment menu remained constant when you move from image to image while in single or n-up edit mode, if you want to compare any settings between multiple images you now have the extra effort to open the relevant section for each image (in the curves and levels sections two clicks might actually be required). If the state was retained you only need to open a section if you want to change it for the next image. In particular I think this is important when you use the n-up mode in order to compare and evaluate multiple images.
Even I the relevant section is unmodified in the next section it would be valuable to have it open by default when you open the image