Hi Piero
Not sure where the blame lies, but it has never worked well or reliably without screenreader mode enabled.
I stopped using the max in my living room for Roon as the family hated screenreader mode so it had to be turned off.
There have been a number of threads on this over time but Roon never makes any improvements to it.
I consider it dead technology in my environment from a Room perspective
On the occasional times I use Roon to display artwork on screen now, I use either an Nvidia Shield through Chromecast or use a Raspberry Pi running RooExtend to display them
Completely gave up on the Nest Hub Max
I believe Chromecast is the only supported solution. You can use a Chromecast dongle with any devices that supports HDMI so you could even get a small screen.
If you want to use the Nest Hub, then keep Screenreader enabled would be my recommendation
As in I can’t remember which thread it was but he was showing off various small wall displays that looked pretty cool. If I was at my computer I could probably find the thread
According to @Wen’s posts, it’s just an Android tablet with unknown specs running the Roon app, isn’t it?
I’m not sure the behaviors and complexity of Android are worth it. RoPieee with the Pi screen is very appliance like once you have it set up. It also has the nice behavior of going to sleep with the zone its attached to is inactive and waking when something is played. My preference would be for something that looks a lot nicer than a Pi in a crummy case, is at least 8" and is higher resolution than the Pi screen, but has the same behaviors as the RoPieee approach.