Toggling a Spline component from an open/closed loop through bp's isn't reflected

Toggling a Spline component from an open/closed loop through bp's isn't reflected

1. Open QA-Game
2. Create an Actor class bp called 'bpSplineLoop' & open it
3. In the Components tab, add a Scene component to the Root
4. Add a Spline component
5. Add a second Spline component & under Spline, enable Closed Loop
6. In the Event Graph, create a function called PrintandFlip
7. In this function, create the bp in screenshot #1
8. Create a function called Debug
9. In this function, create the bp in screenshot #2
10. Compile & save
11. Place the bpSplineLoop into the level
12. Open the Level bp
13. Create the bp in screenshot #3
14. Compile
15. Play the blueprint
16. Spam the F-key to toggle the each Spline to closed and print the length
17. See that the first spline (that IS NOT set to Loop) always has a length of 100 & the second spline (that IS set to Loop) always has a length of 200 (see screenshot #4)

4.7p3 Changing Closed Loop on a spline doesn't cause its length to change