For years, there's the issue, of black source and program-monitor, when using CUDA. Mostly with added effecs like lumetri-color or when using a browser at the same time. A second and third screen which is connected to the USB-C output of the nvidia card, could be an issue as well. There is no fix. Updating drivers and Premiere versions won't solve the problem. For years! So please make this a priority. Higher data-rates demand stronger hardware, but it's useless, if the software cannot handle it.