I have had it happen to me. I know of others that have too. We used to have a regular maintenance schedule with these bombs. They quit that 25 years ago. We used to take them down bring to shop and overhaul them. This included the reclosures on cap banks also. Like a lot of other things the maintenance is not done anymore. You just replace things when they fail. I can't speak for other utilities but thats where we are at. I would think with the lack of people its the same all over. Anything will fail sooner if not maintained but no one seems to care anymore. Like I mentioned its replace at failure.