A very weird (to me) issue with an Audible Illusions Modulus L2B ...

This is my second AI preamp - they sound fantastic but, as we all know, their CS is sh*t, which is why I'm posting here rather than wasting my time trying to call them (I've been waiting for 9 months for a response to a query about getting a copy of an owner's manual for my 30+ year old S-120 amp - after several phone calls, e-mails providing name, rank and serial number at Art's insistence, and unfulfilled promises).

Anyway, about 3 months ago, the blue backlight behind the selector knob went out.  Not really a big deal, and I figured I could live with it that way as it didn't affect the sound in any noticeable way. I just assumed that the diode/led/whater-it-is had burned out and that eventually I'd get around to replacing it. BUT, when I turned it on about an hour ago, the 'broken' backlight is working perfectly fine, but the lights behind the two smaller center knobs (left and right gain - remember, this is the L2B line stage, not a full function preamp, so the knobs are slighlty different, but presumably, the backlighting scheme is the same) started flickering (not in sync with one another) and now they are out, but the one that's been out for 3 months remains on. And, as I'm writing this, the light behind the right gain knob just came back on, but the one behind the left gain knob is still out.  The light behind the main volume knob seems unaffected.  Obviously, these backlights are not in the circuit, so this is essentially a cosmetic issue, but I'm wondering if anyone else has experienced this and what, if anything, they did to fix it.

Thanks, and Happy Turkey Day!!

Neil