Can't select items in modules for markup corrections

[Paul King]

For some reason when using Markup Tools and attempting to select items that are in bathroom modules referenced into current file, I can mark these items for highlighting purposes, but not as corrections.

How do I overcome this and mark library objects in specific modules for correction?

I would really prefer not to explode all modules just for this purpose, because I only need to use these specific instances to show where the hydraulic engineer has omitted connecting pipework to bathroom module fittings - not to designate required one off changes to the module itself.