using clause and methods don't autocomplete

Having a named module (XSCore) where methods, properties, structures and a class (XSCoreControl) reside in the module (actually all these are created in a plugin), XSCore.mymethod (with arguments) autocomplete just fine, but without the “XSCore.” prefix, it does not autocomplete (as it should) even when “using XSCore” predicates calls to methods defined in the module. In contrast, structure names do autocomplete. Is this a general issue, or does it only occur when a plugin defines a module, given that methods in a plugin module are shielded from being global methods?