I used the URP Tutorial project as it offered the possibility of using all of its great features, but using Playmaker and my own project.
I ran into an issue with a Playmaker action "Don't destroy on load".
A specific state uses that action along with the Singleton action. I believe that scenario should be common practice?
When the Scene is run, that object with the Playmaker Fsm should be added to the "Do not Destroy"; unfortunately, that is not the case. It seems to be destroyed as actions related to finding that Playmaker object and its fsm no longer work as expected!
I had to very carefully export my entire project and import it into the Universal core Template to resolve that issue.
The Universal core Template does not have this issue!
Possibly this issue has been reported elsewhere, please accept my apologies.