Crossing at critical temperature of a gas
At the critical temperature/pressure, all properties of liquid and gaseous phase  mutually converge to the same values. There is just one phase at these temperatures, neither liquid, neither gas. Or, both at the same time.
Changing  pressure at temperature above the critical temperature causes continuous changes of the supercritical phase properties without the edge of the gas/liquid phase transition.
Changing  temperature at pressure above the critical pressure causes continuous changes of the supercritical phase properties without the edge of the gas/liquid phase transition.