I'm probably not explaining it right. It appears to me that the pack IS being depleted from Assist, like during my lunch break outing yesterday, and then NOT recharging during the next drive cycle, i.e.; on my way home.
And then on the next drive cycle it woke up and started charging again.
On the way into work this morning it charged up just fine. Full pack, the highest level I've seen yet.
Intermittent problems. I hate 'em.