Immediate thought is how old are the plugs and the coils? High rpm misfire is can be related to either one of those. Old plugs can increase the gap and get spark blowout or just misfire or bad coils can misfire. Look at your log and misfire for each cylinder to see if what cylinder the misfire is happening. Since the Verano uses individual ignition coils you can just do a coil swap from one cylinder to another to determine if it's the coil.