Same here,
I have the same problem as Pepijn. After updating to 381.65 blue/purple vertical line appears on the right side of the image and at the right edge there is also a thin vertical line of random noise.I tried many different Prores422HQ files that I have.
Trying to render to h264 or other codecs burns the problem to the new file.
Switching to OpenCl as Roger mentioned solves the problem.
For the time being I am rolling back to my previous drivers 378.86 that fix the problem.
I am on Windows 10 Pro, Titan X + GTX 1080. Resolve 12.5.5.026
New drivers, new adventures every time..