The expresion On Back Button Pressed works correctly like simple expresion, but if we use it in combination with other expression the expresion is always true.

Example:

Android Object: On Back Button Pressed
Your Action "This action will only run when hit the back key"

Every 01"-00
Android Object: On Back Button Pressed
Your Action "This action will run continuously"


On the other hand, no can Negate the expresion On Back Button Pressed, that would be very useful.