Electric skillet probe control burnt at end

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I'm wondering if it's normal for the end of the probe of an electric skillet to look a little burnt and misshapen (used it twice). (Not asking if it's safe but wondering if others have seen this before).
I'm asking because I've looked online at other electric skillet control probes online and they look a little burnt too. The company said it's not normal and to return it which I probably will do but I wonder if I get another one will it happen again.
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Images: Field Engineer, Field Engineer, Field Engineer, Brett Sayles