I would expect that the issue began with the older split rims. Those were downright dangerous, as they could come apart with less than needed tire pressure. When they did, they came apart with explosive force and many times killed the man standing in front of it.
That said and the fact that RV rims are now drop center, not split rims, tires still do come apart. In fact, I was present when a tire repair man had one come apart that he was inflating. The tire was flat on a concrete floor and he was using a locking valve chuck. The tire let go and flew about 7 feet into the air. Sounded louder than a 12 ga shotgun blast. No one hurt, but a few clean shorts needed.
Get a couple of locking chucks, put them on a 3' lead and use them. Even today with the new drop center wheels, professional truck tire shops use inflation cages and locking chucks.
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