If the chains are scoring the Cylinder rods there are 2 probable causes,

1 the chains are not evenly tensioned allowing one to be slack and rubbing against the cylinder rod when traveling.

2 the operators are lowering the forks too soon while retracting from a pallet, binding on the pallet and allowing the chains to go slack. This will inevitably allow the chains to come into contact with the Cylinder rods, with the results you suggest.

I am sure there are many variations of this theme but the net cause will probably be loose lift chains