"Automatically Connect - no" is not working

I’m using the latest NVIDIA Nsight Graphics to debug a Steam game. When I launch Steam through Nsight, the game’s launcher starts first and then spawns the actual game process. Nsight injects its DLL into both processes, causing a crash. I disabled “Automatically Connect” to manually attach later, but Nsight still auto-injects. How do I make it inject only into the main game executable? Maybe it would be a good idea to add a blacklist tab so that the program definitely doesn’t inject into certain processes.