I have a theory. The tape in the "Bead track" is not allowing the tire bead to hold onto the rim hook well enough. IMO that tape is occupying critical real estate that is a specific size for an important reason. The high pressure seeks the path of least resistance. Over time it pushes the "least well" seated part of the bead away from the rim enough to sneak past it and bursts, like a pinch flat from a bad install. That answers why it happens in random different locations on the same rim. A theory. Nothing more.