I'm running Mojave on a 2018 13" MacBook Pro (2.3GHz i5/16GB) and there's a frequent graphics issue where the whole system stalls every few seconds. Even under low/no load, if I move the cursor around it'll freeze and then jump to another spot ever two or three seconds. If a video's playing, that'll stutter and jump too. I've been on the phone with AppleCare and they suggested removing login items or that it might be cause by settings in my user account. I created another admin user and I'm having the same issue there. Restarting the system solves things for a short time, as does resetting the NVRAM, but it's a recurrent problem. What's worse, is that it's non-reproducible – I can't think of an action that triggers it so I'm hesitant to take it to an Apple Store. My guess is that its somehow liked to Safari, but I can't see what particular actions are the cause. My hope would be that 10.14.1 will fix it, but has anyone else had this issue and had any success in fixing it? And apologies if there's already a thread on this.