Slack user names replaced with Slack IDs when adding Slack message as Asana task comment

When adding a Slack message to Asana as a task comment, Slack user names are being replaced by Slack account IDs.

For example, if the message in Slack is “@CaptKirk Boldly go where no man has gone before.” – the message is copied into an Asana comment as “@ABCD1234 Boldly go where no man as gone before.”