not using binary delta images

Hi,

playing around on balena-cloud. I have noticed tha downloads take a long time. It seems delta images are just as big as the complete images resulting in a long download.

running on the device i see

balena image ls
registry2.balena-cloud.com/v2/224334c4932cacd5341641ab2b6f133c   delta-65d81f75713761ac   e273a7d1f96d   19 minutes ago   2.87GB
registry2.balena-cloud.com/v2/224334c4932cacd5341641ab2b6f133c   latest                   e273a7d1f96d   19 minutes ago   2.87GB
registry2.balena-cloud.com/v2/c1c5fd1973fffabfcf406906b3c85bc5   delta-2f026ba8ccf61e7a   f667b6e4a650   21 minutes ago   1.23GB
registry2.balena-cloud.com/v2/c1c5fd1973fffabfcf406906b3c85bc5   latest                   f667b6e4a650   21 minutes ago   1.23GB
balena_supervisor                                                v14.4.10                 cdeda8370d16   13 days ago      114MB
registry2.balena-cloud.com/v2/6e1bcf249fcc2f8202341d4641c13acf   latest                   cdeda8370d16   13 days ago      114MB

balena push fleetname does show small delta images

[Info]        ┌────────────┬────────────┬─────────────┬───────────────────────┐
[Info]        │ Service    │ Image Size │ Delta Size  │ Build Time            │
[Info]        ├────────────┼────────────┼─────────────┼───────────────────────┤
[Info]        │ octoprint  │ 2.68 GB    │ 22.04 MB    │ 2 minutes, 59 seconds │
[Info]        ├────────────┼────────────┼─────────────┼───────────────────────┤
[Info]        │ controller │ 1.15 GB    │ 1,009.41 KB │ 24 seconds            │
[Info]        └────────────┴────────────┴─────────────┴───────────────────────┘

At first I though it is because of development builds. But this also happens with a production variant.

I’m using raspberrypi4 device and it is a new project.

Is this perhaps only a paid feature?