Adding points to a spline?

Hey there. I’m running into a problem when trying to add points to a spline: I can’t.

I’ve tried in two ways:

-Using the ‘Set Spline Local Points’ node with an array. This shows the points in the blueprint viewport, but in the game editor the spline keeps looking as a default one. If the node is in the construction script, the points are completely ignored. If it’s in the event graph, the points can be used (still can’t be seen in the editor)

-Using both the ‘Add spline local point’ and the ‘Add spline world point’. I get the exact same result as in the previous method

Thing is, am I doing something wrong? What can I do to add points to the spline in the blueprint?

Thanks in advance