Right, I think I might have found a solution for my personal problem.
This might not work for everyone, but it has 100% solved my black screen issues with iCUE.
I have a 2080ti and I discovered in my windows event viewer that I was getting a 4101 display warning. It's just iCUE was triggering this display issue way more than any other program I use for some unknown reason. And I do mean, without iCUE installed it might happen once a month if that, with iCUE it happened every 20 minutes. Anyway, on to the solution. I went to the nvidia control panel, manage 3d settings, global settings and changed power management mode to "Prefer maximum performance".
I've had iCUE running permanently ever since and have not managed to replicate the crash since making this change. It might not work for everyone but hopefully it might help solve it for some people. To anyone who finds this when googling, I hope it helps <3