Unable to Add Tabs to Chats Consistently in Teams via GraphAPI

We are experiencing the exact same issue that appeared to start around the same time.  A service principal using application permissions returns the above error when attempting to pin a static tab to a channel.  We have found the issue to be consistent and failing every time.  

Using the same body payload as a user with the appropriate delegated permissions (even one that does not have membership of the team but simply has the required delegated permissions, ie Group.ReadWrite.All and Directory.ReadWrite.All) succeeds every time.  The issue appears to affect service principals using application permissions.

The issue is affecting multiple tenancies (DEV,UAT,PROD).