Ping pong game, ball moving like classic

I think this line of code has the problem:

  if (Ball_objekt.Bottom >= Player_objekt.Top && Ball_objekt.Bottom <= Player_objekt.Bottom && Ball_objekt.Top >= Player_objekt.Top && Ball_objekt.Right <=Player_objekt.Right)

The ball according to this only bounces back if it is on the left side of the player object, is that what you want?

Maybe the heights of ball and/or player are creating the problem.

What are the height of ball and player objects?

Can you try this code?

if(Ball_objekt.Bottom >= Player_objekt.Top 
&& 
Ball_objekt.Bottom <= Player_objekt.Bottom 
)