I thought @Mik1 meant the forum search function ay the top of the page. Looks like it searches all of Community Forums and can't be narrowed down to one forum, like TV. Depends how general your search term is and whether it's likely to be found in other forums.
@Mik1, the way it's designed is that it will automatically take it back to default and requires you to make your selection again. We replicated this on our test box as well. @OLDYELLR, feel free to add any input.