Exporting signle Artboards for Web is very inconssitent - AI trying to export ENTIRE Workspace

Lately when I go to export a signal artboard (Using File, export, save for web) from a large file with multiple artboards, Illustrator CC will attempt to export the entire workspace. File . Export for screens is a really troublesome way of exporting single web image, because you have to deselect all your artboards, and you have less control over the pixel dimension of the file. So I end up pasting the image into a new document, and exporting from there, except AI CC will not export to the edge of the artboard, but the edge of the artwork, which can chop- off the image. So In addition, I have to create, and then delete crop marks. Suffice to say it has slowed down my workflow greatly, and makes me want to do something else besides work. Is there a preferences or universal setting to have AI CC simply go back to properly exporting single artboards, to their edge, with padding (as .pngs or jpegs) - as it has done for the last 20 years?