We know the ramp test formula is taken as 75% x last avg min power… the 75% is not set in stone, everyone isn’t the same, believe the 75% was ‘accurate’ for the majority.
We have been told that altering the formula can give individuals a more accurate FTP. If I was finding it over-estimating, I would change the formula to maybe 74% or 73% or (whatever works for you) x last avg min power.
So my conclusion would be it’s probably like the bell curve, majority/peak at the 75% but you could be either side (sound like you are in the same place as this local person) , only you alone can make the decision on experience/testing.