When I use to start my bike with my feet touching the ground as little as possible, PAS many times would stop working during my ride, so now I get the bike moving and turn the bike on with my feet off the pedals. I'll try the standing start again, maybe the old bug has disappeared.
My E3 Nitro adds power perfectly when I'm pedaling with the chain on the lower sprocket, but when I shift to the upper sprocket it barely assists even in power level 4. Could it be the chain angle to the torque sensor. My wife has a EMotion Neo City and it does the exact same thing.