Simulator shortcut "x" doesn't work with a matrix in X
While a matrix of arbitrary size is in X, try to copy the content of X to the clipboard. You will find just the last element on the clipboard, not the matrix.
Solution may be difficult since there should be an output in a single line. OTOH, since this is a simulator functionality only, I'd accept an 'impossible' here, too. Then it would not be a bug but only a wrong description which I have to rectify.
What do you think?