Artboard not aligning with objects?

As shown in the image above, since the CC 2018 update, when resizing artboards smart guides show up when trying to align them to an illustration but the dotted line goes a couple of mm down, and it happens vertically too. Thank you in advance for the help, sorry about any mistakes i make trying to speak english, it's not my native language. And even when aling to pixel is deactivated the problem persist, but with less effect, the artboard hover like 1 mm above the object.
