Hi, I have a Mac Mini with 3.2GHz i7 chip, 32GB of RAM and 512GB SSD. I have it directly connected to a LG 4K Ultrafine. I notice it will flicker to a black screen for about 1 second randomly. Usually happens right after I start using the mini for a few minutes when powered on. Anyone else experiencing this? I also have the coil whine issue, but it seems to have improved compared to the first day I used the mini.