I am using an InfoPath form with People/Group Picker fields for approvers, published to a SharePoint form library. When publishing the form, people/group picker fields must be configured to SP site columns as either "DisplayName", "AccountID" or "AccountType".
The Flow should simply pull the email address of the user in the people picker field to send an email. Here is how the Flow is configured (simple test flow):

This is the error I get if people picker configured as "DisplayName":

This is the error I get if people picker configured as "AccountID":

This is the error I get if people picker configured as "AccountType":

Typically people picker fields are published as "DisplayName" and they are recognized as people picker fields in SharePoint and seemingly even in Flow, but as you can see, Flow is having a hard time pulling AD/Azure user info correctly and I'm not sure if it's because of InfoPath or the way we have users setup in AD/Azure, or maybe I'm just not configuring the Flow correctly.
Any help or guidance would be appreciated.