Switching Between Sessions Resets Treeview

Not sure what is going on here or whether this is a setting somewhere, but here is the scenario.
Using the Explorer interface:
1. Open a session (A)
2. Navigate to a directory on (A). Not the treeview that is shown
3. Open another session (B) - different host
4. Navigate to a directory on (B)
5. Go back to session (A)
6. The treeview (folder list) is different than when you left it from #2 above.

This doesn't happen all the time, just most of the time. Is this by design or is this a bug?

Thanks for your help!

It's neither "by design" nor "bug". It's just a limitation of the current implementation.