I believe it has to do with your Player Controller. The Blueprint Side Scrolling template uses a inherited Player Controller that is set by default and isn’t editable.
This issue shouldn’t keep you from moving forward with your project, but if you would like to keep digging into this, try creating a new default Player Controller and comparing it with the one you are using now.
If it still doesn’t give you the results you are looking for, it means the inherited Player Controller from the template is using different references than the user created one.
Thanks, TJ