ESP M-1 Fret Sprout

Just got my m-1 back from a setup and to address some sharp fret ends. Got home and opened up th case to see this. I didn't have any issues with the top of the fretboard going in and it surprises me they didn't see this. Since this is the gnarliest example of fret sprout I've personal seen, I'm unsure of how this may look after sanding and fear it may stand out just as bad forever. Anyone else ever experience something like this?

Just got my m-1 back from a setup and to address some sharp fret ends. Got home and opened up th case to see this. I didn't have any issues with the top of the fretboard going in and it surprises me they didn't see this. Since this is the gnarliest example of fret sprout I've personal seen, I'm unsure of how this may look after sanding and fear it may stand out just as bad forever. Anyone else ever experience something like this?