I work in ACAD Civil Civil3D 2015 and when I have multiple drawings open my keyboard will automatically switch to one of the other drawings and not in the current one that am typing the command for. I have found that if i use undo it will undo in the other drawing and this can be a problem. I find that this happens every time autosave saves. Dee A.

Your keyboard switches to another drawing without you even touching it?  That doesn't even sound possible.Did you try swapping out the keyboard for another one?

This problem does not happen in a previous version of Autocad Civl3d I still use 2012 for older drawingsDee A.

Maybe your description of the problem is inaccurate then.