What is causing the procedural generation to only generate diagonally?

Just started to learn abour procedural generation and decided to follow unreal engines procedural generation example from a stream ( Blueprint Generating Procedural Rooms | Live Training | Unreal Engine - YouTube ). I followed the tutorial exactly but after a couple of minutes i ended up wih only a diagoally generated tile set, I dont really understand what causes this, is it maybe because och changes they have done from previous versions of the engine? What can I do to fix this?

Just found out that when I for example put 3232 it goes diagonally but when a put 3132 it works like it should :confused: