I'm curious if this is a common practice among owners, to try and squeeze every ounce into the tank.

When it clicks off, it's full, slipping a little more in can cause damage to the EVAP system due to fuel going into the lines and possibly damaging the purge valves and other items. This happens often on gas only cars. I'll see EVAP codes due to extreme over filling. Once the system lowers and fuel escapes from the EVAP lines the valves can again send and read vacuum, hopefully. If the fuel went to far some sensors could be fubared.

I'm not up to date on the EVAP systems for Hybrids so I wonder if similar problems could occur...