I am hitting a crash in InputManager because the inputEventData.selectedObject can't be evaluated, resulting a null reference exception and I found that it happens because EventSystem.current is null ...

We are getting an weird exception when; after loading the map, we go to another scene, and then we go back to the map scene. NullReferenceException I/Unity (12213): at ...

A null-conditional operator (?.) applies a member access operation to its operand only if that operand evaluates to non-null. Its useful when you want to access a member from a instance you are not ...