Number Verifier not identifying alphanumeric strings correctly?

I am trying to run a number verification on the file in the screenshot, but the incorrect alphanumeric string in the 1st segment is not flagged at all. The strange thing is that if I make changes to any of the other alphanumeric strings in this file, Number Verifier does report them

Is there perhaps something preventing Number Verifier from recognizing this specific alphanumeric string as being alphanumeric? Is this a bug in the tool? We have many clients that use product/model numbers like these, and it is crucial we get them correct in translation, so it would be great if we could verify them using the Number verifier