Bad signature for request with repeated key in query parameters

[malcolmm83]

I've got a request that's getting a 403
The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.

The request specifies the "created" query parameter key twice like so:
created=ge2000-07-01&created=le2024-03-09

If we use this syntax, the request is accepted.
created=ge2000-07-01,le2024-03-09

Since the original request works fine with AWS signatures in Postman, I'm thinking the duplicated query param key is causing the signature to be generated incorrectly. Please let me know if I can furnish any additional details.