Pickaxe not the effective tool anymore on stone blocks and alike

When i enable this mod, there seems to modify the blocks somehow?
pickaxe is useless agains all stone blocks.

Note,
i have commented out "EldritchMobsBlocks.init();" and i run this mod on server side only.

any ideas? :)

Start by reproducing the issue with the mod enabled on the server and test pickaxe effectiveness against the affected stone blocks. Inspect the path around EldritchMobsBlocks.init() and compare block behavior with the mod disabled; done means pickaxes work normally on stone blocks while the mod remains enabled.

Written by the indexing model from the issue text.