if nothing nasty under those buds, then it's prolly a little bleaching from light.
anything possibly drip on it, since it wasn't close to light?
are there trichomes preset? my bleached buds still had triches. maybe that would point to dying on the stem or microbial if less of them present in damaged areas?
in either case, i'd cut it out and not smoke it. insignificant, so toss whole bud if uncertain.