It's been like that for a a while now. Every morning the hybrid battery would run down to last bar. When I start the car it would be 3/4 full and it would keep draining even though I'm on flat road. The overall milage has not changed much but its annoying with the battery goes to last bar and there's no electric power to help accelerate.
Try warming it for the first 45 seconds.....the engine should stop after that (if you're not using heat). Then drive from that point on.