Inconsistent scores between loop and separate check

[106AbdulBasit]

Description:
I am encountering an issue with SacreBLEU where I am getting inconsistent scores between a loop implementation and a separate check for individual translations. Here are the details of the problem:

sacrebleu.sentence_bleu(sys, [refs])

Scenario: I am calculating BLEU scores for translations using both a loop and individual checks.
Expected Behavior: I anticipate consistent scores between the loop and the separate checks for the same translations.
Actual Behavior: The scores obtained from the loop implementation differ from the scores obtained from the separate check, even when using the same translation and reference pairs.
Example: Here is an example that demonstrates the discrepancy:
Translation: sys4 = "..." # Example translation
Reference: ref4 = ["..."] # Example reference
Expected Score (separate check): 100.0004
Actual Score (loop): 31.94
Steps to Reproduce:

Load the necessary data and libraries.
Implement the loop calculation using SacreBLEU, storing scores for each translation.
Perform a separate check for a specific translation and reference pair, using the same SacreBLEU calculation.
Compare the scores obtained from the loop and separate check.
Additional Information:

I have tried modifying the code, removing any potential sources of error, but the discrepancy persists.
I have verified that the data inputs are aligned correctly, and the sentence preprocessing is consistent.
I suspect there might be an issue related to how SacreBLEU is utilized in the loop implementation.
Any guidance or insight into this issue would be greatly appreciated. Thank you!