Bug or feature, Orbital fabber help build regular structures

I was just messing around and I noticed the orbital fabber can assist any land fabricator. I'm not sure if this is working as intended or part of the build.

I think its a feature but I am not sure.

It's broken as intended.

It makes sense that they would be able to assist land units. After all they can build teleporters on the ground and that is intended.

That makes sense. I just figured the only thing it should be able to build is the teleporter and nothing else on the ground.

What's funnier is non-orbital fabbers trying to build orbital structures.
Wacky waving inflatable arm flailing tube man!

Not just trying, actually they can build them just fine.
At least it's was true in prior versions.