Hello this bug doesnt need any capx or explanations. it is a colision bug.
If you create simple pong game , and the ball fly fast , it sometimes go thorough the padles , pretty often. how to fix this?
It's not a bug, it's the way c2 works i guess, something like that was discussed here. You can try to set "Bullet" On for you ball and paddle, and try to set stepping iterations to greater values. But if the ball is going fast as hell, this may not help.