Hi Kent,
Snakeoyl products are the people that have the contract for the mounts, Bob sold them the business when he closed the race team down and they are the makers of the new shields. I would give them a call about this if Jon cannot get anywhere. I have been informed of this before yes, but have never seen it first hand to determine the real cause if it is excessive heat or possibly a defect in that particular mount. We have sold a ton of these without issues so I don't know why randomly people see this. I would venture to guess that if you replace them with the shields and it happens again there is another cause. Have you changed anything on the car? Hood, fascia mods anything that could have changed air flow to this area?