Adding a Team using Microsoft Graph API, App vs. Delegated Permissions

Trinetra-MSFT , yes, we are aware of that and in fact are using a Teams Admin service account for other tasks.  But we are prevented from creating a global admin service account for security reasons, and according to this article (see https://docs.microsoft.com/en-us/microsoftteams/limits-specifications-teams) each Teams Admin account is limited to creating a maximum of 250 teams.  As a result, we have to use App Permissions to create the groups (as there are a lot of them).  But there seems to be a bug when adding a team to the group using app permissions and so we use a Teams Admin account to add the team with delegated permissions.