I can usually get the needle up to the top (in my case the top is 30L/100km which is about 7mpg) anytime I accelerate moderately hard from a slow speed. When coasting to a stop while the ICE is running (cold or charging, etc.) it will quickly drift up to the top range as the car comes to a stop, but isn't usually there when above 5 or 10mph. I guess to really figure if this is normal or defect is to try to figure where engine temp, battery SoC, and A/C might factor in during this time. When you do come to a stop and if ICE is still running, it should stop within a few seconds. Then the needle should drop. If it doesn't, then something is wrong for sure.

Two climate control systems, one inside and the other at the tailpipe.

2007 Camry Hybrid (in service June 2006)
FE: 6.67L/100km or 35.3 mpg (6.11L/100km or 38.5 mpg in summer)