TPMS Sensors

I've got about 65K on my Job 2 truck right now - and I'm on my third set of these sensors in the wheels!? Anyone else have any issues with these!? It seems that the band comes apart and then the sensor itself will become a projectile inside the tire. Not good. Really messes up the balance on that tire and the light comes on the dash. I had a couple replaced when it was under the 36K general warranty. I've replaced all 4 at least once at my expense and at least one more came off the other day. Its at the dealer now. They say that this is a common problem especially on the larger diameter truck wheels. I've got the factory 20's w/ factory size tires. Anyone else seen these issues!?