In contrast to the 1.7x version, it is now (and in the 1.8.0x version) no longer possible to convert the area to artboard! An artboard is created, but not at the desired position. Also the function Undo after creating the artboard does not work, so you can never go back to the origin!
Please note that the workspace moves again and again after each use of the Undo function, which should not be the case!
I have included an example with document history, please solve the problem.