Hello johnboy,
thank you for the post.
If I understood correctly, you do not need to set it up manually after every reboot now. The problem is that it takes the system around 3 minutes to grant the app full disk access after startup. Is that right? We had one similar report outside of the forums. Unfortunately this entire flow is managed by macOS and we can't influence this. Hopefully Apple has similar reports and will resolve it in later versions of Catalina.
I am sorry that I can't provide steps to fully resolve this.
Best regards,
Jakub