Of gold, lapis lazuli, iron, diamond, and emerald, the required pickaxe material differs from ore to block only with emerald, leading me to think that this is unintentional or at least undesirable.
I'm able to reproduce the bug with any FOV setting at or above 100. (Does not appear at or below 99.)
Of gold, lapis lazuli, iron, diamond, and emerald, the required pickaxe material differs from ore to block only with emerald, leading me to think that this is unintentional or at least undesirable.