While using Long exposure noise reduction, is it okay if i move the camera after taking the shot, when the camera is doing the noise reduction?

I am using a nikon d5600. When i turn on the Long exposure NR, the camera takes as much time after the photo to process it, as the actual photo duration . I understand that this is because it takes some kind of black empty photo during this process.

So, if i shoot a 10 or 15 second photo, and then the camera starts doing the noise reduction. Can i move the camera i.e. change the composition during this processing phase, or do i have to keep camera in same position during this time ?