Imagine a group. Let's isolate it and hide one object, lock another, and leave the third one as it is. Ctrl+A to select all and then move the selection. Illustrator then moves all the objects, despite it does not behave like this on canvas.

If you check layers, you’ll see that Illustrator targets all children (double circle markers) but not a parent (the recent fix), and selects all objects including the parent (big square markers).

If you try to move the selection, all objects get moved.

This is not what happens if we try to select objects on canvas, locked and hidden objects are ignored. Polls about expectations with further private questionings I made tell that some users are aware of it, and they are mostly power users that discovered it long ago, but most users expect locked/hide objects to stay in place — approximately 2 to 1.

There is another case that has a similar behaviour — artboards you can move and have objects on them moved as well, despite them being locked or hidden, and there is an option…