So have a 2018 MBP, I7, 16GB, 512 SSD. D3 played perfectly for several months. However, for the last couple of weeks (since current season) when I go to look at my inventory, character sheet, vendor, etc., there is a long lag time between when I hit the open my inventory and when stuff actually appears in all the slots (bags, equipment, etc). It used to all populate instantly, now it doesn’t. It’s not lag on my end, using a 500mbs fiber connection. Game itself loads lightning fast as always, but viewing inventory (my own or a merchants) including my chest, takes 10-30 seconds, as they show empty and then stuff starts slowly appearing.