have the following problem. greenscreen recordings in 3840x2160 inserted in the project and edited with the chroma keyer. everything great, he plays a lot when rendering and some green screen recordings are missing. also very strange when I e.g. a new greenscreen shot additions are all gone at once. still in the timeline but even the thumbnail on the timeline is gone. vegas latest version, someone has a solution. I'm desperate, thanks
sometimes he doesn't even open the project. and remains at 4%. etc. I think you really can't work with.