Every time anything about the game changes, the slotted gui items get cleared.
This makes it very annoying to use if I ever tweak anything in the settings/enabled mods.
The easy fix would to to make sure one of your own mod settings is changed at all before nuking it.
The more complex fix would be to not nuke it, but fix the data on whatever way that makes sense.
This has been fixed in 1.1.0. The mod will now no longer reset its state if you change settings for other mods. It will also not reset if you change settings for this mod either.