I have contacted GS about this. They investigated a bit and we came up with the following:
As it turns out the reason for this behavior is in the default settings.
Apperently Revit development feel that Architects do want to see Room Tags in their files but Structural and MEP guys do not. The "Room Tag" is a family in Revit. In Revit Architecture it is loaded with the default template file, in Structure and MEP it is not.
When opening an IFC file in Revit, the program first loads the default template file and imports the IFC content into that. The reason those Room Tags do not appear in Structure and MEP is because the Room Tag family is not loaded.
The solution is to modify the default template file in Revit. Open the Template file for editing, load the Room Tag family and save the changes.
Then next time you open an IFC file the Room Tags will be there and displayed because the Room Tag family is loaded.
Here is where to find the location of the default template file:
Click the Autodesk button in the top left and click Options. In the Dialog, go to the File locations tab and there you will see the name of the default template file.
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