I am not sure that I agree that this is a bug. In the Object Browser we display whatever Object user has clicked last. Also if you expand the tables-tree and clcik a table the table and not the database will be highlighted. The dropdown/combo however will always show what is the current database contect.
But we do find room for improvements as with a rather 'greyish' background color the highlighting will be hard to see. We are discussing (one option could be to use BOLD in the OB for current database) and also we do plan some 'fresh-up' of the user interface.