Thought I posted an image of this, apparently it didn't. Here it is.
The first room of the project (called rmInit) has the code "room_set_live(rmInit, true);" in its creation code. The only thing i can think of is that that room's only used for a Global Control object to set a bunch of variables before moving to a proper title screen, so maybe that's the issue?
(And of course, Obj_GMLive is present in that room...)