getSize() from blob metadata returns full size when sending range request to JClouds running on GCS

// ---- REDACTED: Creating a blobStore context from GCS provider ----- 

// Create blob, payload size is 12 bytes
byte[] payload = "Hello World!".getBytes();
assertEquals(12, payload.length);
Blob blob = blobStore.blobBuilder(blobName).payload(payload).build();

// Put blob to GCS
blobStore.putBlob(bucketName, blob);

// ----- 1. Retrieve blob -----
Blob resultBlob = blobStore.getBlob(bucketName, blobName);

// ----- 2. Retrieve blob with range query -----
GetOptions getOptions = new GetOptions().range(0,4);
Blob resultRangeBlob = blobStore.getBlob(bucketName, blobName, getOptions);

// ----- 3. Read content of blob and assert size (12 for the first one, 5 for the second) -----
byte[] buffer = new byte[15];
int readBytesFromBlob = resultBlob.getPayload().openStream().read(buffer);
int readBytesFromRangeBlob = resultRangeBlob.getPayload().openStream().read(buffer);Assert.assertEquals(12, readBytesFromBlob);
assertEquals(12, readBytesFromBlob); 
assertEquals(5, readBytesFromRangeBlob);

// ----- 4. Get blobs sizes from respective metadata -----
Long blobSize = resultBlob.getMetadata().getSize();
Long rangeBlobSize = resultRangeBlob.getMetadata().getSize();

assertEquals(Long.valueOf(12), blobSize);

// The following assertion fails
// The rangeBlobSize equals 12, the full blob length
// Whereas it should reflect only the size that has been read (5 in this case)
assertEquals(Long.valueOf(5), rangeBlobSize);