And I would have expected an experienced tech like Proshadetree to have considered these things, but is the "plugging" set really soft, to keep the tire from spinning when they reach the edge of the ice and the operator plugs to slow down the truck? is there a buildup of ice at the door where the truck goes from an iced floor to a concrete floor?
How is the tire breaking down, is it the poly crystallizing, is it de-bonding from the metal ring of the tire, or is it 'chunking' out (breaking off pieces so that the tire is no longer round)?
Are they spinning the tire on the iced floor?
Set the controlled acceleration so that the wheel won't spin.