As per the title, using the Select Other to add balloons to a balloon stack for items that are behind other items in a view doesn't always work. Even when it does work it's a slow and clunky way of adding up a stack of balloons.
Only way around it is to either Ctrl + Q which doesn't always work, close down and reopen the drawing or add a balloon for something else and then reattach it to the thing you want.
Why aren't these little things sorted rather than focusing on big shiny yearly upgrades?
SolidworksDrawings And Detailing