Does Team MS Flow allows the co-owner to manage our personal

Question

We have implemented a MS Flow which will be triggered when a mail is sent to a shared mail box. Once the flow was shared to another user, the owner of the shared mail box is able to view and manage the personal outlook mailboxes of the other members of the shared mail box.

 

Now the flow is not shared with anyone, but the problem still persists.

 

We have used many other shared mailboxes and this issue has never happened with them.Please suggest on why this is happening.