Tags Assigned to Existing Revisions are Removed when Deploying CloudRun with PipeCD

[twryJP]

What happened:

When deploying a new revision of CloudRun with PipeCD, tags assigned to existing revisions are removed. Specifically, when tags are allocated to an existing revision of CloudRun and a new deployment is carried out via PipeCD, the tags that were previously assigned to the existing revision are removed.
I added the following code to the spec.pipeline.stages in app.pipecd.yaml and redeployed. As a result, the traffic to the revision deployed by PipeCD was 0%, but similar to the previous case, the tags assigned before the deployment were removed from the existing revision.

pipeline:
  stages:
    - name: CLOUDRUN_PROMOTE
      with:
        percent: 0

What you expected to happen:

Deploying CloudRun with PipeCD should not affect the tags assigned to existing revisions.

How to reproduce it:

1. Assign tags to the existing revision of the target CloudRun.
2. Deploy a new revision of the target CloudRun using PipeCD.
3. Observe that the previously assigned tags are removed from the existing revision.

Environment:

• piped version: v0.47.2
• control-plane version:
• Others: