I have the most updated drivers on a Windows 10 machine with an nVidia RTX 4000 When I updated to 14.3 and begin to edit I found two issues, each with a common defect.
first, I had to change the speed on a clip from 100 to 80". On playback and render it looked like there were black frames. A frame by frame examination showed random frames that were dark and yellow, like the blue channel had dropped out.
I also saw the same thing when exporting a still frame. This was from another clip, so it's not the clips fault.
I've attached two stills, you can see the color change. Version 14.2 does not do this.
Andy Post commented
OK..Uploading one file as two seems to be one too many for this process.