Screen randomly freezes

Hello,
After about 1 year of use, I observed that my Teracube 2E running under IodeOS B 2.25 starts randomly freezing: I mean that when touching the screen to open / close an app, or entering characters, whatever… the mobile doesn’t answer anymore. The only solution is to switch off the screen with the side button and then, to switch it on. Painful isn’t?
Because of a similar pb and others, I sent back my 1st mobile to the company more than one year ago, but I now discover that the same trouble appears again with my 2nd mobile!
It sounds like the system is aging…

I am not happy at all!

Any idea or comment?
Tkx, Antoine