User Avatar not showing up after import (using S3)

If I do not use S3, user avatars show up after running the import script (custom, OSQA to Discourse).
If I use S3, user avatars do not show up.

user_avatars table is populated, and so is the uploads table.

Is there something that I am missing here?

Thanks.

Edit: I am getting this in the logs:
Could not find file in the store located at url: //discourseproduction.s3.dualstack.us-east-1.amazonaws.com/original/1X/613bdbe1638062bdb6ccd26f85f6b4beaf141f81.jpeg