Cannot copy same file multiple times to Google Cloud Storage

When I try to copy the same file with the same file name, it only copies the file to the bucket the first time.
Example:
The first time the file is copied to the bucket successfully.
root@460f7a4537f1:/home#gsutil cp -L /var/log/log.log file.csv gs://bucketname/file.csv
Copying file://file.csv [Content-Type=text/csv]...
/ [1 files][ 65.6 KiB/ 65.6 KiB]
Operation completed over 1 objects/65.6 KiB.

The second time gsutil does nothing
root@460f7a4537f1:/home#gsutil cp -L /var/log/log.log file.csv gs://bucketname/file.csv
root@460f7a4537f1:/home#

Regards.
Manuel.
gsutil version: 5.5

Start by reproducing the repeated `gsutil cp -L` command against Google Cloud Storage using the issue's example and version 5.5. Trace the copy path that decides whether an existing destination is updated, then verify that a second copy completes and replaces the destination as expected.

Written by the indexing model from the issue text.