The input of crushers has been broken by your latest update 6.10.18 (related to causing damage?) Shredder is tested and still works fine.
Wait what, the Crusher and the Shredder use the same Code, just different textures, recipes and center blocks. Lemme check something.
Are you sure you did put the Crusher Controller and not the Shredder Controller for the Crusher? Did the Multiblock even form yet? Magnifying Glass can help finding out.
I changed nothing it worked before the update it has crushed many thousands of ores before this no problem. Also the crusher is empty
edit: okay nvm server restart fixed the problem idk why though but disregard this post