LCD glitch during a long print

[luigimannoni]

I've flashed this firmware on the stock XY2PRO-Titan last year, runs mostly OK apart 2 or 3 minor things, the only major issue is LCD touch screen glitches sometimes.

In some scenarios it's just an overlapping of characters between menus while printing, in some case it is more severe like during a continuous long print after two hours or so the screen looks like this:

Is there a way to update the Marlin to the latest version? Does this repo has only configuration changes or some source files have been touched as well?

Thanks.