I am using 12.1.2 on XP and I am seeing a minor issue with the move line command.
If I have the cursor focus sit on the very last brace of my java class, move that brace up one line with the keyboard shortcut, all the imports from the top of the file gets moved to the bottom of the class.
The reason why I am moving that last brace up is just to clear some empty lines, instead of just going to that line and deleting it.