Yep a LOT of problems with 2019 here as well. I've got two new projects in 2019, what a mistake. Program constantly quits out of the blue. Serious rendering issues. Bitmaps show up black until zoom way in. Section viewports look normal but zoom in or out and suddenly all you can see is a few weird little lines, it basically disappears. If you go in to edit section and back out, it renders normally, until zoom in and out again....can't print this way. VW please don't release new versions that are so buggy, what an incredible time-waster. I can't bill my clients for this ridiculousness. Not putting any other projects on 2019 until it's normal.