Cloning private Channels with the Teams Graph API doesn't work

Question

I'm using the POST /teams/{id}/clone

• apps - Copies Microsoft Teams apps that are installed in the team.
• channels – Copies the channel structure (but not the messages in the channel).
• members – Copies the members and owners of the group.
• settings – Copies all settings within the team, along with key group settings.
• tabs – Copies the tabs within channels.

Reference: https://docs.microsoft.com/en-us/graph/api/team-clone?view=graph-rest-1.0&tabs=http

The problem I face is following:

After the Post the copied Team looks like this:

The "Test Channel Private" can't be found in the new Team.