As I wrote, there in the display settings in the advanced is no option screen off - “never”. Originally, nothing was selected, and the longest period was 30 minutes. Unfortunately, I touched that 30 minutes, and now the second panel (4.2.2) also turns off. And it cannot be undone. I see that the only way to fix it is a factory reset and returning to the original software to avoid these new “improvements.” Like they say, “better is the enemy of good.” Ultimately, I will start considering switching the entire panel software to an alternative software.
PS After the factory reset, the panel returned to 4.1.3 and fortunately it’s back to normal.