^ I'd take that as "the mod isn't perfect", and you may see the items still appear, but as meaningless empty slots.
I've seen this happen in other mods. I still can't find which mod is causing it, but I have a "building" appearing as an empty slot that "can be built" taking up one turn to build. It's clearly a glitch that accomplishes nothing by building it. The only thing building it accomplishes is you will no longer see it on your list of things to build for your settlement afterwards.
A small annoyance, but not game-ruining. I imagine that's the case here as well.