I just received my MM2018. Moving things on desktop is not very smooth at 3440x1440@100hz via HDMI2.0 port from the back of the mini. Anyone notice that issue? --- Post Merged, Nov 29, 2018 --- MM2108 config: i7,8GB,256GB Mojave 10.14.1 Monitor Samsung 34” CF791 3440x1440 100hz Update:UI smooth with a wired g502 mouse, less smooth with a mx master (usb Dongle connected), little stutter with mx master (Bluetooth). New issue: Not always to show up the boot screen or login screen with HDMI connected to the cf791 monitor. I can only see a black screen with backlight on. It is quite annoying. Need to have a replacement?