I have upgraded to Vegas pro recently and export is fine but I'm editing Christmas video for social media recorded portrait so I am swapping width and height numbers to match the project or source video.
But when I do that the result is like this with some kind of error - lines in angle, sound OK, but that's some kind of distorted image.
It must be a bug because what could I possibly do wrong? Do I need to tweak any other settings to make sure everything is OK?
The preview when rendering looks fine but afterwards it looks like this: