Volumio control

Volumio Information

Volumio Version:2.777
Hardware: rpi4
DAC:on board
I control the volumio with volumio.local. I have observed if I put in background the page and I want to return after 20 minutes let say and open again the volumio. Local from background the UI takes a little time until the response is ok. During this time the UI fails if I press the buttons but after a while is ok
Also I have bought also the android app.
What is the preferred version of controlling the UI via phone app or via volumio.local?
Thanks in advance.