In response to my support inquiry, Magix has told me that they will not Support VegasPro 20, and that the only way to fix the problem is to purchase the upgrade(s) to VegasPro 23. But I have also read that this actually an issue with VegasPro 23 as well.
Okay, so time to move on to a different video editing software provider. While I'm fortunate to have FCPX on a computer provided by my employer, I need solid, dependable video editing software on my Win laptop too. I can't waste time and money on a company that refuses to support it's product. Good luck to all those suffering with the same issue. I'm don't have time to wait around to see if this will ever be resolved.