Maybe there is an option but someone will have to point it out to me: how can I ensure that my Blobs are stored as full Blob objects and not ShortBlobs?

The issue for me is that I'm writing entities to the datastore using gcloud-java and then reading them with Objectify. When reading I see the error: Expected class com.google.appengine.api.datastore.Blob, got class com.google.appengine.api.datastore.ShortBlob: <ShortBlob: 247 bytes>

I'm inserting my Blobs like this:
entityBuilder.set("compressedText", BlobValue.builder(Blob.copyFrom(compressedtext)).build());
where compressedtext is a byte[]