Move Tool always moves entire layer, cannot move selection without cutting and pasting.

Whenever I try to select something with any selection tool or option enabled, GIMP does not move the selection, period. Instead, when I attempt to move the selection, the entire image is moved, as if the image is selected and has priority over all other selections. I have tried the following solutions that I found online:

• Select > None
• Ensure that Move is set to Move the Active Layer
• Ensure that none of the channels (Pixels, Position and Size, Alpha Channel) are locked
• Change preferences of tool options to Set Layer or Path as Active
• Reset saved tool options
• Added an Alpha Channel
• Set the Alpha to the Selection
• Create a duplicate layer and delete the original
• Create a layer from the visible and delete the original
• Create a new project
• Restart GIMP

I'm somewhat losing my mind here- this was working with no issues the previous night until I finished an image, saved it, and reopened the program to work on something else. I don't know what setting I possibly could have changed or option I hit, but I'm completely stumped on how to fix this. Any ideas?