AWS CLI sets wrong file type, file gets downloaded with the wrong extension

I recently experienced the following issue using the AWS CLI:

1. I uploaded a .csv.gz file to S3.
2. I generated a presigned link.
3. The presigned link served the file with the wrong extension(.csv.csv instead of .csv.gz).

I think this is a bug in S3, where they misidentify the file type when a file has multiple extensions.
Thankfully, this can be easily solved, both for existing files, and for future uploads:

• For existing files: I clicked on the object in the web interface, and scrolled down to Metadata.
• Sure enough, the "Content-Type" key had the wrong value (it was "text/csv").
• I clicked the "Edit" button, and manually changed it to the correct type, namely "application/x-gzip". They have The existing presigned link also reflected the change.
• For future uploads: setting the content type explicitly ensures I will always get the desired content type, e.g.: --content-type application/x-gzip