A way I just got it to work after MANY failed attempts:
It seemed every time I loaded up my game it would default to collision on in the CAP, so after trying to do the glitch 100 times I had an idea.
I went to the park editor, turned collision off, did a random film challenge (to trigger an auto-save) and then tried the glitch and it worked!
It may be that when people decline the update and load a park, collision is defaulting to on. Don't know if its a full fix or not, but if you're having trouble try it out!