3812272 - Why is an Expense Report containing expenses flagged as sent back to the user stuck in external validation?

A expense report is stuck in the pending external validation status. This report contains one or more expenses with field "Send Back Expense?" checked.
The Expense Report should not have reached this state. The expenses marked as Sent Back to the User should have been split into a new Report and sent back to the user.

HCA Support - EY Global Services An Expense Report is stuck in Pending External Validation approval step. This report contains one or more expenses with field "Send Back Expense?" checked. , KBA , CON-INT , Integrations , Problem