This has to be a glitch because it makes no sense and is a change from any past behavior - in Vegas Pro 19 on a Windows 10 machine. RTX 3090 GPU. The display of the video preview keeps changing to a strange small vertical format almost like a phone screen in vertical orientation, very low resolution even though the project size is set to a larger resolution and normal aspect ratio. I checked the display settings and it makes no difference what is checked or unchecked. The secondary display also is a smaller size than the usual full screen. It doesn't matter what resolution I set - draft, preview, best etc. This happens when I have project settings at 4K or UHD. When I then switch to HD, same media on the timeline, it is suddenly a normal aspect ratio display in the video preview screen and the secondary monitor. Vegas has never done that in any version I ever used. What is going on here?