Execute Changeset appears to only work once

The first time execute changeset runs, it succeeds. The change is made and the task in Azure Devops completes.

Subsequent executions of the task do apply the changeset, but the task will never complete and has to be cancelled. I believe the reason is that the task is waiting for the stack to reach "create complete" status. However this never happens because thestack status enters "Update Complete" status instead following the initial deployment.

Start at the Execute Changeset task and trace how it waits for the CloudFormation stack status after applying a changeset. Reproduce both the initial deployment and a subsequent execution, then verify that the task completes when the stack reaches either the initial or update completion status.

Written by the indexing model from the issue text.