Confidence Score in FindMatches returning 0 where IDs match

We are running an AWS Glue Studio job determine matches between certain products. The Job works very well, however we are unable to add the Confidence score correctly to the output.

The initial script did not have computeMatchConfidenceScores in it as it is defaulted to = False.

We have added the clause to the script but the output returns 0 on every line, even where the matches are 100%. Below is a snipped of the script:

findmatches2 = FindMatches.apply(frame = resolvechoice1, transformId = "<redacted>",  transformation_ctx = "findmatches2", computeMatchConfidenceScores = True)

We have searched everywhere for some sort of answer to this but come up short.