Referring to below photo, the description on the component is different (middle character type), polarity is different than the first article and it has got contamination on the components. Could you pls advise about the reason?

This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Referring to below photo, the description on the component is different (middle character type), polarity is different than the first article and it has got contamination on the components. Could you pls advise about the reason?

抱歉,没有关于丝印的相关文档。关于器件标记查询,请您查阅:https://www.ti.com.cn/packaging/cn/docs/partlookup.tsp
如果ti.com购买的产品使用有质量问题,建议您参阅下面这个链接:
https://www.ti.com.cn/zh-cn/support-quality/additional-information/customer-returns.html