In the meanwhile I added similar configuration to a powerful i7 Labtop (also using the docker container).
Same issue: When switching to a new page on the mobile app it can take a couple of seconds until the new page shows up.
As I think hinted in the previous threads, the performance of your server has very little influence - it’s the device that you’re viewing the UI on which makes a difference. Viewing the UI on a browser from my powerful PC is better (faster) than viewing the UI on a browser on my underpowered phone. The MainUI requires your UI client to perform a lot of maths!
Thanks for the hint. It would be good to have a responsive UI on the Mobile App as I believe that is what many use for controlling their smarthome. This is basically the first user experience, a button is pressed and a couple of seconds later the page is opened.