Sharp fret ends have often proven to be fret sprout in my experience. Dried out, shrunken fretboards that feel like a saw blade, usually don't feel that way a couple of days after I set up(which includes a fretboard clean, and oil). With ebony, sometimes it may take a week...the first time around. Most of my unbound rosewood, and ebony boarded guitars have either started with sprout, or have developed it after a cold dry New England winter...a little bore oil, and like magic, it's gone.
Yes, even a couple of the "new" off the wall ones have had a little bit of sprout... who knows how long they sit around, in what conditions? The giveaway(for me) is that the sawblade feel is pretty consistent, and not beyond reason.
The only unbound fretboard that Have not had to oil down at all is the one on my Martin. It's a Richlite board

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Life happens, so does the wether...there's no stopping it sometimes.
Best of luck!