When the energy display pops up, do you see a small yellow triangle/warning type of icon in the lower right corner of the display? If so, this pop up will happen when you transition from a condition where regen is limited to no limit on regen. When it's a little colder, this will happen when the battery is cold, as in lower than about 20C. You may see the energy display pop up for a few seconds when you first start the car to alert there is a limit, and then you'll see it pop back up as the limitation goes away.