Different results in sentiment analysis for Spanish text in uppercase and lowercase letters

[Anabel Valero]

By testing several comments in Spanish language in lowercase and uppercase the API returns different results.

I attach two images of the same text in lowercase and uppercase. For lowercase the sentiment score is -0.7 and for uppercase it is 0.5. The difference is huge. In English language doesn't happen.

Is this an API bug? Will it be solved?

Thanks.

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