Image caches are not purged when deleting uploaded images

When deleting an image, the cached variants are still served. Even after purging the cache for those too manually (several times).

This appears to be a bug.

E.g. this image is actually deleted, but it is still served: https://imagedelivery.net/kIfFIzFTzKlWo697FKW7Qw/asset/ethereum/0xa1290d69c65a6fe4df752f95823fae25cb99e5a7/icon/public