I have this same issue. Not an IKEA chair, but it is a similarly cheap office chair from some big box store. It only affects my external monitors connected to m

I have this same issue. Not an IKEA chair, but it is a similarly cheap office chair from some big box store. It only affects my external monitors connected to my TB3 adapter. I figured out the cause pretty quick, mostly because I assumed my monitors weren't averse to the curse words that spew from my mouth after such an "ESD event."