I:spawnLamentStonesFreq=-1 doesn't prevent Lament Stones

[Jomik]

I set this in my config, and Lament Stones still spawn in the world, at quite a high frequency.

worldgen {
    # A Lament Stone has a 1 in N chances to spawn in a given chunk (the higher the number here, the less stones). -1 to disable.
    I:spawnLamentStonesFreq=-1
}

[Pyrofab]

Fixed in 0.5.4