I pushed Generate Imposters for this avatar at about 2 o'clock Nov 22 (JST) but when I checked when I woke up (around 8:30 JST),
Generate Imposters
button come back without any notification. (I kept the browser tab opened but no new notification is shown.)
So, I clicked
Generate Imposters
again but at about 15 o'clock,
Generate Imposters
button come back without any notification.