Save Subobject Selection

When using "save subobject selection", if all subobjects on object are selected, when using "Paste Subobject selection", all subobjects are pasted back, even if other subobjects have been added to that object.

For example.
Create box. Select all polygons. "Save subobject selection". "Inset" one or more polygons. Clear selection. "Paste subobject selection". All polygons will be selected. The new polygons that where created by the "Inset" should not of been pasted.

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I may as well report the problem I have mentioned on forum before with "Save subobject selection", in that you cannot "save subobject selection" with more than one object selected, if you do, there is an error "Only one object must be selected for this operation".
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I am seeing various problems the more I check ("Save subobject selection"). It appears to be quite problematic/buggy after adding new geometry.

Even the groups show similar issues.