I am facing the same issue as well in 4.11.2 . My spline up didnt get update via BP construction script. I did a couple of DarwDebugLine !to confirm that! The yellow line at spline(0) is the up vector direction. The subsequent spline up should line up nicely at blue/pink line but it didnt update. alt text
Edit: Sorry, my bad!!! I was using “get up vector at spline point” instead of the correct “Get spline up dir”. Everything is doing alrighty for my side.