Search and Autocorrect Case sensitivity not working

I’m doing a search for Order Numbers using the Search and Autocorrect Plugin. The field being searched is alphanumeric. Checking the “Case Sensitive” option in the properties of the S&A seems to make no difference in that whether it’s checked or not, the search will only work if all letters are in capitals.

Here are the properties of the S&A

If I type this into the Search input it works fine
Screenshot 2024-04-26 103024

If I type this into the Search input it finds nothing regardless of the state of the Case Sensitive option…
Screenshot 2024-04-26 103056

Can anyone tell me what I’m doing wrong? I guess I could create a hidden input that converts whatever’s typed in the search box into capitals and use that as the search criteria but that’s just a workaround and, surely, the S&A should be doing it anyway?