What is that flag supposed to do? I'm trying to use a LWC'd button to activate redstone to open a Gate. It doesn't work... but based on the name of this flag, I'm thinking maybe it's not supposed to.
FYI probably won't help, but I got LWC buttons to work on my own server by using '77': instead of Stone_button: in my core.yml file.
Also, after looking around, it seems like the /credstone flag is supposed to toggle whether redstone circuits can toggle the block in question... for instance if you can use wire/pressure plates to open an LWC door... it can be used to prevent exploits. I don't think it has a use (unless they specifically programmed it to have different functionality) for things like buttons/levers that aren't themselves toggled by circuits.