Computers are supposed to be deterministic. I have worked with them for decades, and I know that sometimes there are variables that they're considering that we humans are not. I am trying to figure out what they are in this case . . . Today I took at short trip, 30 minutes each way. Most of it was on I35, which in this area is rolling hills but none of them very long or very steep. On the outbound leg, the gear icon appeared and disappeared consistent with my previous experience. It was pretty elusive, going away at the slightest hint of a hill or an attempt to accelerate. The controller even shut down the ICE and turned on the EV indicator on the panel briefly a couple of times. On the way home, the gear icon pretty much came and stayed. The behavior was dramatically different. I'd say that on the Interstate portion of the trip on the outbound leg the gear icon was there 10% of the time and on the return it was 90%. HV mode. Same road. Same conditions - no rain, no wind. Temperature not more than 5F° different; climate control in the car the same. Cruise control set to the same speed. Slightly less charge in the battery on the way home, but not much; EV range was reading about 20 on the trip home, started at about 29 on the trip out. Other than going north one way and south the other (and remember, no wind) the trip couldn't have been any more similar, but the behavior of the algorithm that decides the power flows was much different. The car drove fine at all times. If it hadn't been for the panel display and an occasional whine of the engine, I would not have been aware of any difference. Maybe there are things we just shouldn't know.