It started happening to mine (2017 FLHXS) a few months ago. I was told by my dealer that it is a screen saver that can be replaced, but at this point it's almost all flaked off. The head unit sucks anyway - was already obsolete in 2014 and the MoCo took until 2019 before it came into the current decade. When it dies (and it will), I'll replace it with something decent. The aftermarket has filled the void.