WAW transit security
When I flew ORD-WAW-LWO, I did not have to go through any additional security at WAW. They had someone waiting at the end of the jet bridge directing people to the correct gate. Basically got off the plane and walked 2min to the next gate.
But when I flew LWO-WAW-ORD, I had to pass through security screening before being able to enter the terminal and board my WAW-ORD flight.
Why was there no additional security on arrival at WAW but additional security (and I will say they were quite rude and ineffective) for the return flight?