Investigation summary: a device history record review was completed by our quality engineer team for provided material number 306594 and lot number 1201709.The review did not reveal any detected abnormalities during the production process that could have contributed to this defect and all quality tests were found to be within specification.As a sample was unavailable for return, a thorough sample investigation could not be completed.Based on the investigation results, an exact cause for this incident could not be identified.
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