I'll add shortly it but i think i will also do other thing that is adding letter "z" at the beginning of this modname to hope it solves all future issues. It might consider this as a new mod and your mod settings may reset, just the stack number.
I don't believe it causes any compatibility issues with old saves made with this mod, because data is loaded much before savefiles so stacksizes are already set before. And this is still new mod so it's worth doing it.