MSFS Boeing CDU: STAR & APP

Have I missed a trick when it comes to entering procedures in the CDUs of the 787 & 747?
When you click on, for instance, a STAR, the available approaches disappear from view and thus cannot be selected.
If instead you click on an APP, the STARs disappear from view and become unselectable.
It seems as if you can have one but not the other.
For example, flying into Mumbai VABB and needing to choose the MOLG2A and the ILS Y RW27.
I have literally spent hours on this, so any and all help would be gratefully received.