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ADM7171 EN pin Short to Ground failure mode

Category: Hardware
Product Number: ADM7171

I've recently been using the ADM7171 and ran this failure twice now where these LDOs. These are failing while sealed in vacuum and they are being temperature regulated all data shows these chips are not experiencing heat beyond the maximum rating or any ESD when they are failing, yet when we remove them the EN pin has been shorted to ground ~6 ohms, diode testing shows 0V between the pins in both directions. Is there anything i might be missing that is causing this failure?