Smush Pro and AWS Offload s3 free version

I ran Smush pro yesterday on 1405 images. ALL of them ended up with 0 data. All images sizes ALL ZERO! I had to reload everything and delete Smush off the planet.

This site has been running since 2016 using AWS Offload s3 free version and since Smush Pro actually had a check box for it I decided if finally knew how to handle off server images. Boy was I wrong. Is this a know problem???