Weird colors, glitching, screen trating and flickering is all symptoms on upcoming GPU failure. I think its just some software that triggers the hardware errors
All my glitches have been on login when the system loads the color profile i made with a colorimeter, after i changed back to original color profile i havent seen it yet. And the colorprofile have link to the gpu
AND for me it seems its the intel 530 gpu that is the problem. Which explaind why all 3 different AMD configs get these
It could be the Skylake graphics solutions overall, This coupled with the P3 color gamut screen could cause issues, on the iMac it's always running the AMD solution instead of the Intel (due to the 5K resolution)... This is my best guess because looking at how many 2016 Macbook Pros have been shipped (with either 450-455-460) those can't all have flawwed GPUs. I think it's a driver issue with the Intel IGP.