I don't know if this issue belongs to your mod o the other, the thing is, when having your mod and also coppermine's Bob module rebalancing(https://mods.factorio.com/mod/CoppermineBobModuleRebalancing) , the productivity module requester requires module combining case as an extra ingredient. I really don't mind the extra ingredient, but I do mind it being only in one of the four recipes.
As I said, don't know which side the issue is on, but I told this to coppermine a while ago and he didn't say or do anything
