If you select an item in the default workspace, you have the focus on the jcr tree. If you change to live workspace, you should have the focus of this item in the jcr live tree, but it does work.

For instance, using the nightly platform : search for id 59f3fc15-3e83-48da-bee0-31b44724d7b9 on default, then try to swtich to live