I have an Actor with SplineComponent. I spawn SplineMeshComponents along the spline. In editor when I click on the spline point and try to move it, instead the entire actor gets moved.
I make sure that SplineComponent is selected (instead of the whole Actor) when I drag the gizmo:
Since you are using the spline mesh component, do you have "Allow Spline Editing Per Instance enabled on the blueprint? You can find more information here:
Hmm, I don’t see this option available anywhere. Seems that if you add the component from blueprint via ‘Add Spline Mesh Component’ node then there is no way to set it?
EDIT:
Found the issue. I had to turn on ‘Input Spline Points to Construction Scripts’ on the SplineComponent. Then I had to deselect and select the Actor - without it I would still move the entire Actor.