Duplicating collections in 2.81 not copying everything I'm trying to copy everything in a collection (I don't want them linked) 
 called Camera.001 from one scene to another scene (the second scene is in the same blender file).  But I notice that when I duplicate a collection called Camera.001 not everything is duplicated over to the Camera.002 collection. See animated gif below.  

The parented text to_see_it_animated_ijk4de_website is not copied over to the Camera.002 collection is this a bug, am I doing something wrong, is there a workaround.

I'm using Blender 2.81 on Ubuntu 18.04 64bit
The parented text object is actually missing even from the .001 collection (it's grayed out).
So it won't get duplicated.

How it happens
When you move parented (child) object into another collection, the parent relationship gets broken.
The child object icon will be grayed out, so you know it's broken.

And broken relationship doesn't get duplicated.

Solution
Find your parented text object, and move it back into the .001 Collection.
Then it will reconnect and will be duplicated with the parent.

Moving a parented object into a different collection breaks the relationship.
Moving it back reconnects it.