Weird LED behaviour on Digitone

Hi everyone, a weird thing happened when I turned on my Digitone this morning: the page, T2 and T4 buttons LEDs remain turned on, they turn already on during bootup (while all the other buttons LEDs are still off) and remain stuck, they blink and change colors and remain always on, the buttons themselves are still working OK but it’s pretty annoying, since I can’t see when those two tracks are muted, and it’s something it never did before. When I lastly used it two days ago everything was normal, no power surge, turned everything off as usual and now this. Already tried switching cables with the DT, still same problem. Anyone has experienced that?