@pocketpair the issue turned out to be related with the Asset Pipeline V2, it has been reported to the team and a fix will be developed as soon as possible as startup time is very important to us.
In the meantime you can’t switch back to Asset Pipeline V1 as V2 is now a requirement for the latest version of entities.
I would personally encourage you to try and make fast enter play mode working because it totally eliminates this kind of issue, as the related code will be run only once.