Owners are only added as owners and not as members on Office 365 groups.
When you create a team from the Microsoft Teams admin center, owners are only added as owners and not as members on Office 365 groups.
A group with 0 members is created, which causes the planner to fail.
We work around this by adding the owner as a member from the Microsoft 365 admin center.
Teams created from the Teams app have Owners added to Owners and Members when viewed on Office 365 Groups.
No errors in the planner tab.
I want you to improve this behavior.
As of 2018, Microsoft agents are aware of the community.