Impossible to retrieve custom built images

[damanuel]

Occurs on firmware-selector.openwrt.org:

Custom builds, e.g. builds that were triggered with customized installed packages, seem to land in an unaccessible location in https://sysupgrade.openwrt.org/store/. For example the link I got provided with to download the custom image is https://sysupgrade.openwrt.org/store/f24806c1cf34d548173702a4cf945b14 (returns 404). There seems to be no way to retrieve the image.

This is potentially related to https://github.com/openwrt/asu/issues/642, I don't know any of the internals, so maybe not.