Radeon VII with driver v23.9.2 doesn't want to play nicely with Vegas 15 when GPU Acceleration is turned on. Editing colors or rendering a video causes to show incorrect colors. Not sure if this GPU's drivers are just an after thought as this doesn't happen with my much older 980 Ti (v537.13 drivers) and nothing with my 3090 (v537.13 drivers). Already posted another issue in this subforum as well regarding Armored Core VI.
Sent both issues to AMD Bug Report Tool.